2022
Journal Articles
Siguín, Marta; Blanco, Teresa; Rossano, Federico; Casas, Roberto
Modular E-Collar for Animal Telemetry: An Animal-Centered Design Proposal Journal Article
In: Sensors, vol. 22, no. 1, 2022, ISSN: 1424-8220.
@article{s22010300,
title = {Modular E-Collar for Animal Telemetry: An Animal-Centered Design Proposal},
author = {Marta Siguín and Teresa Blanco and Federico Rossano and Roberto Casas},
url = {https://www.mdpi.com/1424-8220/22/1/300},
doi = {10.3390/s22010300},
issn = {1424-8220},
year = {2022},
date = {2022-01-01},
journal = {Sensors},
volume = {22},
number = {1},
abstract = {Animal telemetry is a subject of great potential and scientific interest, but it shows design-dependent problems related to price, flexibility and customization, autonomy, integration of elements, and structural design. The objective of this paper is to provide solutions, from the application of design, to cover the niches that we discovered by reviewing the scientific literature and studying the market. The design process followed to achieve the objective involved a development based on methodologies and basic design approaches focused on the human experience and also that of the animal. We present a modular collar that distributes electronic components in several compartments, connected, and powered by batteries that are wirelessly recharged. Its manufacture is based on 3D printing, something that facilitates immediacy in adaptation and economic affordability. The modularity presented by the proposal allows for adapting the size of the modules to the components they house as well as selecting which specific modules are needed in a project. The homogeneous weight distribution is transferred to the comfort of the animal and allows for a better integration of the elements of the collar. This device substantially improves the current offer of telemetry devices for farming animals, thanks to an animal-centered design process.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Animal telemetry is a subject of great potential and scientific interest, but it shows design-dependent problems related to price, flexibility and customization, autonomy, integration of elements, and structural design. The objective of this paper is to provide solutions, from the application of design, to cover the niches that we discovered by reviewing the scientific literature and studying the market. The design process followed to achieve the objective involved a development based on methodologies and basic design approaches focused on the human experience and also that of the animal. We present a modular collar that distributes electronic components in several compartments, connected, and powered by batteries that are wirelessly recharged. Its manufacture is based on 3D printing, something that facilitates immediacy in adaptation and economic affordability. The modularity presented by the proposal allows for adapting the size of the modules to the components they house as well as selecting which specific modules are needed in a project. The homogeneous weight distribution is transferred to the comfort of the animal and allows for a better integration of the elements of the collar. This device substantially improves the current offer of telemetry devices for farming animals, thanks to an animal-centered design process.
Gascón, Alberto; Casas, Roberto; Buldain, David; Marco, Álvaro
Providing Fault Detection from Sensor Data in Complex Machines That Build the Smart City Journal Article
In: Sensors, vol. 22, no. 2, 2022, ISSN: 1424-8220.
@article{s22020586,
title = {Providing Fault Detection from Sensor Data in Complex Machines That Build the Smart City},
author = {Alberto Gascón and Roberto Casas and David Buldain and Álvaro Marco},
url = {https://www.mdpi.com/1424-8220/22/2/586},
doi = {10.3390/s22020586},
issn = {1424-8220},
year = {2022},
date = {2022-01-01},
journal = {Sensors},
volume = {22},
number = {2},
abstract = {Household appliances, climate control machines, vehicles, elevators, cash counting machines, etc., are complex machines with key contributions to the smart city. Those devices have limited memory and processing power, but they are not just actuators; they embed tens of sensors and actuators managed by several microcontrollers and microprocessors communicated by control buses. On the other hand, predictive maintenance and the capability of identifying failures to avoid greater damage of machines is becoming a topic of great relevance in Industry 4.0, and the large amount of data to be processed is a concern. This article proposes a layered methodology to enable complex machines with automatic fault detection or predictive maintenance. It presents a layered structure to perform the collection, filtering and extraction of indicators, along with their processing. The aim is to reduce the amount of data to work with, and to optimize them by generating indicators that concentrate the information provided by data. To test its applicability, a prototype of a cash counting machine has been used. With this prototype, different failure cases have been simulated by introducing defective elements. After the extraction of the indicators, using the Kullback-Liebler divergence, it has been possible to visualize the differences between the data associated with normal and failure operation. Subsequently, using a neural network, good results have been obtained, being able to correctly classify the failure in 90% of the cases. The result of this application demonstrates the proper functioning of the proposed approach in complex machines.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Household appliances, climate control machines, vehicles, elevators, cash counting machines, etc., are complex machines with key contributions to the smart city. Those devices have limited memory and processing power, but they are not just actuators; they embed tens of sensors and actuators managed by several microcontrollers and microprocessors communicated by control buses. On the other hand, predictive maintenance and the capability of identifying failures to avoid greater damage of machines is becoming a topic of great relevance in Industry 4.0, and the large amount of data to be processed is a concern. This article proposes a layered methodology to enable complex machines with automatic fault detection or predictive maintenance. It presents a layered structure to perform the collection, filtering and extraction of indicators, along with their processing. The aim is to reduce the amount of data to work with, and to optimize them by generating indicators that concentrate the information provided by data. To test its applicability, a prototype of a cash counting machine has been used. With this prototype, different failure cases have been simulated by introducing defective elements. After the extraction of the indicators, using the Kullback-Liebler divergence, it has been possible to visualize the differences between the data associated with normal and failure operation. Subsequently, using a neural network, good results have been obtained, being able to correctly classify the failure in 90% of the cases. The result of this application demonstrates the proper functioning of the proposed approach in complex machines.
2021
Journal Articles
Casas, Roberto; Hermosa, Arturo; Marco, Álvaro; Blanco, Teresa; Zarazaga-Soria, Francisco Javier
Real-Time Extensive Livestock Monitoring Using LPWAN Smart Wearable and Infrastructure Journal Article
In: Applied Sciences, vol. 11, no. 3, 2021, ISSN: 2076-3417.
@article{app11031240,
title = {Real-Time Extensive Livestock Monitoring Using LPWAN Smart Wearable and Infrastructure},
author = {Roberto Casas and Arturo Hermosa and Álvaro Marco and Teresa Blanco and Francisco Javier Zarazaga-Soria},
url = {https://www.mdpi.com/2076-3417/11/3/1240},
doi = {10.3390/app11031240},
issn = {2076-3417},
year = {2021},
date = {2021-01-01},
journal = {Applied Sciences},
volume = {11},
number = {3},
abstract = {Extensive unsupervised livestock farming is a habitual technique in many places around the globe. Animal release can be done for months, in large areas and with different species packing and behaving very differently. Nevertheless, the farmer’s needs are similar: where livestock is (and where has been) and how healthy they are. The geographical areas involved usually have difficult access with harsh orography and lack of communications infrastructure. This paper presents the design of a solution for extensive livestock monitoring in these areas. Our proposal is based in a wearable equipped with inertial sensors, global positioning system and wireless communications; and a Low-Power Wide Area Network infrastructure that can run with and without internet connection. Using adaptive analysis and data compression, we provide real-time monitoring and logging of cattle’s position and activities. Hardware and firmware design achieve very low energy consumption allowing months of battery life. We have thoroughly tested the devices in different laboratory setups and evaluated the system performance in real scenarios in the mountains and in the forest.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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Extensive unsupervised livestock farming is a habitual technique in many places around the globe. Animal release can be done for months, in large areas and with different species packing and behaving very differently. Nevertheless, the farmer’s needs are similar: where livestock is (and where has been) and how healthy they are. The geographical areas involved usually have difficult access with harsh orography and lack of communications infrastructure. This paper presents the design of a solution for extensive livestock monitoring in these areas. Our proposal is based in a wearable equipped with inertial sensors, global positioning system and wireless communications; and a Low-Power Wide Area Network infrastructure that can run with and without internet connection. Using adaptive analysis and data compression, we provide real-time monitoring and logging of cattle’s position and activities. Hardware and firmware design achieve very low energy consumption allowing months of battery life. We have thoroughly tested the devices in different laboratory setups and evaluated the system performance in real scenarios in the mountains and in the forest.
Calavia, Belén; Blanco, Teresa; Casas, Roberto
Fostering creativity as a problem-solving competence through design: Think-Create-Learn, a tool for teachers Journal Article
In: Thinking Skills and Creativity, vol. 39, pp. 100761, 2021, ISSN: 1871-1871.
@article{CALAVIA2021100761,
title = {Fostering creativity as a problem-solving competence through design: Think-Create-Learn, a tool for teachers},
author = {Belén Calavia and Teresa Blanco and Roberto Casas},
url = {https://www.sciencedirect.com/science/article/pii/S1871187120302352},
doi = {https://doi.org/10.1016/j.tsc.2020.100761},
issn = {1871-1871},
year = {2021},
date = {2021-01-01},
journal = {Thinking Skills and Creativity},
volume = {39},
pages = {100761},
abstract = {Although there is no doubt about the relevance of creativity within education, theory has not been always translated into the practical level, for many reasons. In this paper we analyse the state of art, studying the methods through which creativity is understood and applied by teachers, and identifying problems and opportunities. Accordingly, we conducted a literature review to identify what should be considered to foster creativity in classrooms; from this review, we define fifteen key indicators of creativity in education: incorporation, practicality, novel, atmosphere, stimulation, analysis, cooperation, intrinsic motivation, participation, flexibility, uncertainty, time, divergence, self-evaluation, and redefinition. Based on these indicators, we provide a methodological proposal and a set of practical resources to help the teacher to encourage creativity in any classroom. ‘Think-Create-Learn’ relies on open, accessible, and intuitive design-based tools, facing challenges through a creative, problem-solving approach; connecting the contents with the student’s interests and reality; and generating new competency learning possibilities. The assessment of the methodology, with teachers and students, demonstrates its positive integration into the lines of current teaching curriculums, its validity to support mentioned factors, and its ability to aid teachers to produce more creative people. In short, this paper evidences how design discipline and the methodology proposed could have a relevant role in the creativity development inside educational centres.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Although there is no doubt about the relevance of creativity within education, theory has not been always translated into the practical level, for many reasons. In this paper we analyse the state of art, studying the methods through which creativity is understood and applied by teachers, and identifying problems and opportunities. Accordingly, we conducted a literature review to identify what should be considered to foster creativity in classrooms; from this review, we define fifteen key indicators of creativity in education: incorporation, practicality, novel, atmosphere, stimulation, analysis, cooperation, intrinsic motivation, participation, flexibility, uncertainty, time, divergence, self-evaluation, and redefinition. Based on these indicators, we provide a methodological proposal and a set of practical resources to help the teacher to encourage creativity in any classroom. ‘Think-Create-Learn’ relies on open, accessible, and intuitive design-based tools, facing challenges through a creative, problem-solving approach; connecting the contents with the student’s interests and reality; and generating new competency learning possibilities. The assessment of the methodology, with teachers and students, demonstrates its positive integration into the lines of current teaching curriculums, its validity to support mentioned factors, and its ability to aid teachers to produce more creative people. In short, this paper evidences how design discipline and the methodology proposed could have a relevant role in the creativity development inside educational centres.
Sanz-Gorrachategui, Iván; Pastor-Flores, Pablo; Pajovic, Milutin; Wang, Ye; Orlik, Philip V; Bernal-Ruiz, Carlos; Bono, Antonio; Artal-Sevil, Jesús Sergio
Remaining Useful Life Estimation for LFP Cells in Second-Life Applications Journal Article
In: IEEE Transactions on Instrumentation and Measurement, vol. 70, pp. 1-10, 2021, ISSN: 1557-9662.
@article{9343322,
title = {Remaining Useful Life Estimation for LFP Cells in Second-Life Applications},
author = {Iván Sanz-Gorrachategui and Pablo Pastor-Flores and Milutin Pajovic and Ye Wang and Philip V Orlik and Carlos Bernal-Ruiz and Antonio Bono and Jesús Sergio Artal-Sevil},
doi = {10.1109/TIM.2021.3055791},
issn = {1557-9662},
year = {2021},
date = {2021-01-01},
journal = {IEEE Transactions on Instrumentation and Measurement},
volume = {70},
pages = {1-10},
abstract = {The increasing deployment of battery storage applications in both grid storage and electric vehicle fields is generating a vast used battery market. These batteries are typically recycled but could be reused in second-life applications. One of the challenges is to obtain an accurate remaining useful life (RUL) estimation algorithm, which determines whether a battery is suitable for reuse and estimates the number of second-life cycles the battery will last. In this article, the RUL estimation problem is considered. We propose several health indicators (HIs), some of which have not been explored before, along with simple yet effective estimation and classification algorithms. These algorithms include classification techniques such as regularized logistic regression (RLR), and regression techniques such as multivariable linear regression (MLR) and multilayer perceptron (MLP). As a more advanced solution, a multiple expert system combining said techniques is proposed. The performance of the algorithms and features is evaluated on a recent lithium iron phosphate (LFP) data set from Toyota Research Institute. We obtain satisfactory results in the estimation of RUL cycles with errors down to 49 root mean square error (RMSE) cycles for cells that live up to 1200 cycles, and 0.24% mean relative error (MRE) for the prediction of the evolution of capacity.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
The increasing deployment of battery storage applications in both grid storage and electric vehicle fields is generating a vast used battery market. These batteries are typically recycled but could be reused in second-life applications. One of the challenges is to obtain an accurate remaining useful life (RUL) estimation algorithm, which determines whether a battery is suitable for reuse and estimates the number of second-life cycles the battery will last. In this article, the RUL estimation problem is considered. We propose several health indicators (HIs), some of which have not been explored before, along with simple yet effective estimation and classification algorithms. These algorithms include classification techniques such as regularized logistic regression (RLR), and regression techniques such as multivariable linear regression (MLR) and multilayer perceptron (MLP). As a more advanced solution, a multiple expert system combining said techniques is proposed. The performance of the algorithms and features is evaluated on a recent lithium iron phosphate (LFP) data set from Toyota Research Institute. We obtain satisfactory results in the estimation of RUL cycles with errors down to 49 root mean square error (RMSE) cycles for cells that live up to 1200 cycles, and 0.24% mean relative error (MRE) for the prediction of the evolution of capacity.
2020
Journal Articles
Marín, Javier; Blanco, Teresa; Torre, Juan; Marín, José J
Gait Analysis in a Box: A System Based on Magnetometer-Free IMUs or Clusters of Optical Markers with Automatic Event Detection Journal Article
In: Sensors, vol. 20, no. 12, 2020, ISSN: 1424-8220.
@article{s20123338,
title = {Gait Analysis in a Box: A System Based on Magnetometer-Free IMUs or Clusters of Optical Markers with Automatic Event Detection},
author = {Javier Marín and Teresa Blanco and Juan Torre and José J Marín},
url = {https://www.mdpi.com/1424-8220/20/12/3338},
doi = {10.3390/s20123338},
issn = {1424-8220},
year = {2020},
date = {2020-01-01},
journal = {Sensors},
volume = {20},
number = {12},
abstract = {Gait analysis based on full-body motion capture technology (MoCap) can be used in rehabilitation to aid in decision making during treatments or therapies. In order to promote the use of MoCap gait analysis based on inertial measurement units (IMUs) or optical technology, it is necessary to overcome certain limitations, such as the need for magnetically controlled environments, which affect IMU systems, or the need for additional instrumentation to detect gait events, which affects IMUs and optical systems. We present a MoCap gait analysis system called Move Human Sensors (MH), which incorporates proposals to overcome both limitations and can be configured via magnetometer-free IMUs (MH-IMU) or clusters of optical markers (MH-OPT). Using a test-retest reliability experiment with thirty-three healthy subjects (20 men and 13 women, 21.7 ± 2.9 years), we determined the reproducibility of both configurations. The assessment confirmed that the proposals performed adequately and allowed us to establish usage considerations. This study aims to enhance gait analysis in daily clinical practice.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Gait analysis based on full-body motion capture technology (MoCap) can be used in rehabilitation to aid in decision making during treatments or therapies. In order to promote the use of MoCap gait analysis based on inertial measurement units (IMUs) or optical technology, it is necessary to overcome certain limitations, such as the need for magnetically controlled environments, which affect IMU systems, or the need for additional instrumentation to detect gait events, which affects IMUs and optical systems. We present a MoCap gait analysis system called Move Human Sensors (MH), which incorporates proposals to overcome both limitations and can be configured via magnetometer-free IMUs (MH-IMU) or clusters of optical markers (MH-OPT). Using a test-retest reliability experiment with thirty-three healthy subjects (20 men and 13 women, 21.7 ± 2.9 years), we determined the reproducibility of both configurations. The assessment confirmed that the proposals performed adequately and allowed us to establish usage considerations. This study aims to enhance gait analysis in daily clinical practice.
Marin, Javier; Marin, Jose J; Blanco, Teresa; Torre, Juan; Salcedo, Inmaculada; Martitegui, Elena
Is My Patient Improving? Individualized Gait Analysis in Rehabilitation Journal Article
In: Applied Sciences, vol. 10, no. 23, 2020, ISSN: 2076-3417.
@article{app10238558,
title = {Is My Patient Improving? Individualized Gait Analysis in Rehabilitation},
author = {Javier Marin and Jose J Marin and Teresa Blanco and Juan Torre and Inmaculada Salcedo and Elena Martitegui},
url = {https://www.mdpi.com/2076-3417/10/23/8558},
doi = {10.3390/app10238558},
issn = {2076-3417},
year = {2020},
date = {2020-01-01},
journal = {Applied Sciences},
volume = {10},
number = {23},
abstract = {In the rehabilitation field, clinicians are continually struggling to assess improvements in patients following interventions. In this paper, we propose an approach to use gait analysis based on inertial motion capture (MoCap) to monitor individuals during rehabilitation. Gait is a cyclical movement that generates a sufficiently large data sample in each capture session to statistically compare two different sessions from a single patient. Using this crucial idea, 21 heterogeneous patients with hemiplegic spasticity were assessed using gait analysis before and after receiving treatment with botulinum toxin injections. Afterwards, the two sessions for each patient were compared using the magnitude-based decision statistical method. Due to the challenge of classifying changes in gait variables such as improvements or impairments, assessing each patient’s progress required an interpretative process. After completing this process, we determined that 10 patients showed overall improvement, five patients showed overall impairment, and six patients did not show any overall change. Finally, the interpretation process was summarized by developing guidelines to aid in future assessments. In this manner, our approach provides graphical information about the patients’ progress to assess improvement following intervention and to support decision-making. This research contributes to integrating MoCap-based gait analysis into rehabilitation.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the rehabilitation field, clinicians are continually struggling to assess improvements in patients following interventions. In this paper, we propose an approach to use gait analysis based on inertial motion capture (MoCap) to monitor individuals during rehabilitation. Gait is a cyclical movement that generates a sufficiently large data sample in each capture session to statistically compare two different sessions from a single patient. Using this crucial idea, 21 heterogeneous patients with hemiplegic spasticity were assessed using gait analysis before and after receiving treatment with botulinum toxin injections. Afterwards, the two sessions for each patient were compared using the magnitude-based decision statistical method. Due to the challenge of classifying changes in gait variables such as improvements or impairments, assessing each patient’s progress required an interpretative process. After completing this process, we determined that 10 patients showed overall improvement, five patients showed overall impairment, and six patients did not show any overall change. Finally, the interpretation process was summarized by developing guidelines to aid in future assessments. In this manner, our approach provides graphical information about the patients’ progress to assess improvement following intervention and to support decision-making. This research contributes to integrating MoCap-based gait analysis into rehabilitation.
Vizárraga, Jorge; Casas, Roberto; Marco, Álvaro; Buldain, David J
Dimensionality Reduction for Smart IoT Sensors Journal Article
In: Electronics, vol. 9, no. 12, 2020, ISSN: 2079-9292.
@article{electronics9122035,
title = {Dimensionality Reduction for Smart IoT Sensors},
author = {Jorge Vizárraga and Roberto Casas and Álvaro Marco and David J Buldain},
url = {https://www.mdpi.com/2079-9292/9/12/2035},
doi = {10.3390/electronics9122035},
issn = {2079-9292},
year = {2020},
date = {2020-01-01},
journal = {Electronics},
volume = {9},
number = {12},
abstract = {Smart IoT sensors are characterized by their ability to sense and process signals, producing high-level information that is usually sent wirelessly while minimising energy consumption and maximising communication efficiency. Systems are getting smarter, meaning that they are providing ever richer information from the same raw data. This increasing intelligence can occur at various levels, including in the sensor itself, at the edge, and in the cloud. As sending one byte of data is several orders of magnitude more energy-expensive than processing it, data must be handled as near as possible to its generation. Thus, the intelligence should be located in the sensor; nevertheless, it is not always possible to do so because real data is not always available for designing the algorithms or the hardware capacity is limited. Smart devices detecting data coming from inertial sensors are a good example of this. They generate hundreds of bytes per second (100 Hz, 12-bit sampling of a triaxial accelerometer) but useful information comes out in just a few bytes per minute (number of steps, type of activity, and so forth). We propose a lossy compression method to reduce the dimensionality of raw data from accelerometers, gyroscopes, and magnetometers, while maintaining a high quality of information in the reconstructed signal coming from an embedded device. The implemented method uses an adaptive vector-quantisation algorithm that represents the input data with a limited set of codewords. The adaptive process generates a codebook that evolves to become highly specific for the input data, while providing high compression rates. The codebook’s reconstruction quality is measured with a peak signal-to-noise ratio (PSNR) above 40 dB for a 12-bit representation.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Smart IoT sensors are characterized by their ability to sense and process signals, producing high-level information that is usually sent wirelessly while minimising energy consumption and maximising communication efficiency. Systems are getting smarter, meaning that they are providing ever richer information from the same raw data. This increasing intelligence can occur at various levels, including in the sensor itself, at the edge, and in the cloud. As sending one byte of data is several orders of magnitude more energy-expensive than processing it, data must be handled as near as possible to its generation. Thus, the intelligence should be located in the sensor; nevertheless, it is not always possible to do so because real data is not always available for designing the algorithms or the hardware capacity is limited. Smart devices detecting data coming from inertial sensors are a good example of this. They generate hundreds of bytes per second (100 Hz, 12-bit sampling of a triaxial accelerometer) but useful information comes out in just a few bytes per minute (number of steps, type of activity, and so forth). We propose a lossy compression method to reduce the dimensionality of raw data from accelerometers, gyroscopes, and magnetometers, while maintaining a high quality of information in the reconstructed signal coming from an embedded device. The implemented method uses an adaptive vector-quantisation algorithm that represents the input data with a limited set of codewords. The adaptive process generates a codebook that evolves to become highly specific for the input data, while providing high compression rates. The codebook’s reconstruction quality is measured with a peak signal-to-noise ratio (PSNR) above 40 dB for a 12-bit representation.
Proceedings Articles
Guillén-Asensio, A; Sanz-Gorrachategui, I; Pastor-Flores, P; Artal-Sevil, J S; Bono, Antonio; Brío, Bonifacio Martín; Bernal-Ruiz, C
Battery state prediction in photovoltaic standalone installations Proceedings Article
In: 2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER), pp. 1-6, 2020.
@inproceedings{9243111,
title = {Battery state prediction in photovoltaic standalone installations},
author = {A Guillén-Asensio and I Sanz-Gorrachategui and P Pastor-Flores and J S Artal-Sevil and Antonio Bono and Bonifacio Martín Brío and C Bernal-Ruiz},
doi = {10.1109/EVER48776.2020.9243111},
year = {2020},
date = {2020-09-01},
booktitle = {2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)},
pages = {1-6},
abstract = {Effective energy treatment is one of the challenges to which scientists are devoting more interest and resources. Currently, there is a need to optimize the generation of energy by renewable methods and to improve the storage and management of battery cells. One of these emerging lines aims to face the problem of uncertainty that exists in the generation of energy in photovoltaic installations. In this paper, we proposed to use machine learning methods to predict the state (voltage) of the batteries at several days into the future. The results obtained from two recurrent neural networks such as NARX and LSTM are compared, getting good results with both. Two approaches are considered: sample-based prediction and pattern-based forecasting.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
Effective energy treatment is one of the challenges to which scientists are devoting more interest and resources. Currently, there is a need to optimize the generation of energy by renewable methods and to improve the storage and management of battery cells. One of these emerging lines aims to face the problem of uncertainty that exists in the generation of energy in photovoltaic installations. In this paper, we proposed to use machine learning methods to predict the state (voltage) of the batteries at several days into the future. The results obtained from two recurrent neural networks such as NARX and LSTM are compared, getting good results with both. Two approaches are considered: sample-based prediction and pattern-based forecasting.
Artal-Sevil, J S; Sanz-Gorrachategui, I; Pastor, P; Bernal-Ruiz, C; Perez-Cebolla, F J; Bono, Antonio
New Smart Control based on MPPT/MEPT Algorithm for Hybrid Fuel Cell Power System Proceedings Article
In: 2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER), pp. 1-10, 2020.
@inproceedings{9243139,
title = {New Smart Control based on MPPT/MEPT Algorithm for Hybrid Fuel Cell Power System},
author = {J S Artal-Sevil and I Sanz-Gorrachategui and P Pastor and C Bernal-Ruiz and F J Perez-Cebolla and Antonio Bono},
doi = {10.1109/EVER48776.2020.9243139},
year = {2020},
date = {2020-09-01},
booktitle = {2020 Fifteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)},
pages = {1-10},
abstract = {In this paper, a new algorithm for enhanced management of a hybrid fuel-cell system is proposed. The purpose of this algorithm, which has been called Maximum Efficiency Point Tracking algorithm (MEPT-algorithm), is to polarize the fuel cell in an optimum point maximizing its efficiency and minimizing the fuel consumption. The goal is to guarantee fast power transients in the load while the fuel cell is kept in the optimum point by the hybridization of a fuel cell with an energy storage system (ESS) based on ultracapacitors. The hybrid power system model has been simulated in Matlab/Simulink applying the proposed algorithm and the classical Maximum Power Point Tracking (MPPT) algorithm. The combined control in DC/DC converters allows us to modify the Fuel Cell's operating point, as well as its MPPT or MEPT algorithm. A detailed analysis of the results verifies the benefits of the use of MEPT vs only the MPPT. Typical figures of merit and conclusions are also presented in this paper.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper, a new algorithm for enhanced management of a hybrid fuel-cell system is proposed. The purpose of this algorithm, which has been called Maximum Efficiency Point Tracking algorithm (MEPT-algorithm), is to polarize the fuel cell in an optimum point maximizing its efficiency and minimizing the fuel consumption. The goal is to guarantee fast power transients in the load while the fuel cell is kept in the optimum point by the hybridization of a fuel cell with an energy storage system (ESS) based on ultracapacitors. The hybrid power system model has been simulated in Matlab/Simulink applying the proposed algorithm and the classical Maximum Power Point Tracking (MPPT) algorithm. The combined control in DC/DC converters allows us to modify the Fuel Cell’s operating point, as well as its MPPT or MEPT algorithm. A detailed analysis of the results verifies the benefits of the use of MEPT vs only the MPPT. Typical figures of merit and conclusions are also presented in this paper.
Artal-Sevil, J S; Bernal-Ruiz, C; Bono, Antonio; Peñas, Santos M
Design of a Fuzzy-Controller for a Magnetic Levitation System using Hall-Effect sensors Proceedings Article
In: 2020 XIV Technologies Applied to Electronics Teaching Conference (TAEE), pp. 1-9, 2020.
@inproceedings{9163711,
title = {Design of a Fuzzy-Controller for a Magnetic Levitation System using Hall-Effect sensors},
author = {J S Artal-Sevil and C Bernal-Ruiz and Antonio Bono and Santos M Peñas},
doi = {10.1109/TAEE46915.2020.9163711},
year = {2020},
date = {2020-07-01},
booktitle = {2020 XIV Technologies Applied to Electronics Teaching Conference (TAEE)},
pages = {1-9},
abstract = {This paper shows the implementation of Fuzzy Control techniques on a small Magnetic Levitation system. The analyzed application is a study problem of a non-linear and unstable system. Fuzzy control is an appropriate alternative for those cases where modelling the system is complicated, mainly due to the mathematical complexity of the model. The advantage of Fuzzy techniques is that any additional adjustment in the system only requires modifying the different fuzzy rules implemented, instead of redesigning the entire associated controller again. The control implemented here is made up of two feedback loops (position and current variables). A Hall sensor has been used to determine the position of the sphere to be levitated. Matlab/Simulink has been the software used for the development of the model and its simulation. In this way, the dynamic response of the system has been studied. The results and the different figures of merit obtained are shown by simulating the model presented. The initial objectives have been satisfactorily achieved.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper shows the implementation of Fuzzy Control techniques on a small Magnetic Levitation system. The analyzed application is a study problem of a non-linear and unstable system. Fuzzy control is an appropriate alternative for those cases where modelling the system is complicated, mainly due to the mathematical complexity of the model. The advantage of Fuzzy techniques is that any additional adjustment in the system only requires modifying the different fuzzy rules implemented, instead of redesigning the entire associated controller again. The control implemented here is made up of two feedback loops (position and current variables). A Hall sensor has been used to determine the position of the sphere to be levitated. Matlab/Simulink has been the software used for the development of the model and its simulation. In this way, the dynamic response of the system has been studied. The results and the different figures of merit obtained are shown by simulating the model presented. The initial objectives have been satisfactorily achieved.
2019
Journal Articles
Calavia, Belén; Blanco, Teresa; Casas, Roberto
Formando a personas creativas en la era digital. Evaluación x-disciplinar de una herramienta basada en el diseño Journal Article
In: Re_Visiones sobre Arte, Patrimonio y Tecnología en la era digital, pp. 185, 2019.
@article{ferrandez2,
title = {Formando a personas creativas en la era digital. Evaluación x-disciplinar de una herramienta basada en el diseño},
author = {Belén Calavia and Teresa Blanco and Roberto Casas},
year = {2019},
date = {2019-09-01},
journal = {Re_Visiones sobre Arte, Patrimonio y Tecnología en la era digital},
pages = {185},
keywords = {},
pubstate = {published},
tppubtype = {article}
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Gorrachategui, Iván Sanz; Flores, Pablo Pastor; Bono, Antonio; Brío, Bonifacio Martín; Ruiz, Carlos Bernal
Mapas Auto-Organizados (SOM) para la detección de envejecimiento en baterías Journal Article
In: Jornada de Jóvenes Investigadores del I3A, vol. 7, 2019.
@article{gorrachategui2019mapas,
title = {Mapas Auto-Organizados (SOM) para la detección de envejecimiento en baterías},
author = {Iván Sanz Gorrachategui and Pablo Pastor Flores and Antonio Bono and Bonifacio Martín Brío and Carlos Bernal Ruiz},
doi = {10.26754/jji-i3a.003609},
year = {2019},
date = {2019-01-01},
journal = {Jornada de Jóvenes Investigadores del I3A},
volume = {7},
keywords = {},
pubstate = {published},
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Sanz-Gorrachategui, Iván; Ruiz, Carlos Bernal; Usabiaga, Estanis Oyarbide; Bono, Antonio; Sevil, Sergio Jesús Artal; Perez, Erik Garayalde; Larranaga, Iosu Aizpuru; Segade, Jose Maria Canales
Partial State-of-Charge Mitigation in Standalone Photovoltaic Hybrid Storage Systems Journal Article
In: Energies, vol. 12, no. 22, 2019, ISSN: 1996-1073.
@article{en12224393,
title = {Partial State-of-Charge Mitigation in Standalone Photovoltaic Hybrid Storage Systems},
author = {Iván Sanz-Gorrachategui and Carlos Bernal Ruiz and Estanis Oyarbide Usabiaga and Antonio Bono and Sergio Jesús Artal Sevil and Erik Garayalde Perez and Iosu Aizpuru Larranaga and Jose Maria Canales Segade},
url = {https://www.mdpi.com/1996-1073/12/22/4393},
doi = {10.3390/en12224393},
issn = {1996-1073},
year = {2019},
date = {2019-01-01},
journal = {Energies},
volume = {12},
number = {22},
abstract = {Energy Storage in photovoltaic installations has increased in popularity in recent years due to the improvement in solar panel technology and energy storage systems. In several places where the grid is not available, in remote isolated rural locations or developing countries, isolated photovoltaic installations are one of the main options to power DC micro-grids. In these scenarios, energy storage elements are mandatory due to the natural day-night cycles and low irradiation periods. Traditionally, lead-acid batteries have been responsible for this task, due to their availability and low cost. However, the intermittent features of the solar irradiance patterns and load demand, generate multiple shallow charge-discharge cycles or high power pulses, which worsen the performance of these batteries. Some Hybrid Energy Storage Systems (HESSs) have been reported in the literature to enhance the lifetime and power capabilities of these storage elements, but they are not intended to overcome the Partial State of Charge (PSoC) issue caused by daily cycles, which has an effect on the short and mid-term performance of the system. This paper studies the impact of the already proposed HESSs on PSoC operation, establishing the optimal hybrid ratios, and implementing them in a real installation with a satisfactory outcome.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Energy Storage in photovoltaic installations has increased in popularity in recent years due to the improvement in solar panel technology and energy storage systems. In several places where the grid is not available, in remote isolated rural locations or developing countries, isolated photovoltaic installations are one of the main options to power DC micro-grids. In these scenarios, energy storage elements are mandatory due to the natural day-night cycles and low irradiation periods. Traditionally, lead-acid batteries have been responsible for this task, due to their availability and low cost. However, the intermittent features of the solar irradiance patterns and load demand, generate multiple shallow charge-discharge cycles or high power pulses, which worsen the performance of these batteries. Some Hybrid Energy Storage Systems (HESSs) have been reported in the literature to enhance the lifetime and power capabilities of these storage elements, but they are not intended to overcome the Partial State of Charge (PSoC) issue caused by daily cycles, which has an effect on the short and mid-term performance of the system. This paper studies the impact of the already proposed HESSs on PSoC operation, establishing the optimal hybrid ratios, and implementing them in a real installation with a satisfactory outcome.
Marín, Javier; Blanco, Teresa; Marín, José J; Moreno, Alejandro; Martitegui, Elena; Aragüés, Juan C
Integrating a gait analysis test in hospital rehabilitation: A service design approach Journal Article
In: PLOS ONE, vol. 14, no. 10, pp. 1-23, 2019.
@article{10.1371/journal.pone.0224409,
title = {Integrating a gait analysis test in hospital rehabilitation: A service design approach},
author = {Javier Marín and Teresa Blanco and José J Marín and Alejandro Moreno and Elena Martitegui and Juan C Aragüés},
url = {https://doi.org/10.1371/journal.pone.0224409},
doi = {10.1371/journal.pone.0224409},
year = {2019},
date = {2019-01-01},
journal = {PLOS ONE},
volume = {14},
number = {10},
pages = {1-23},
publisher = {Public Library of Science},
abstract = {Background Gait analysis with motion capture (MoCap) during rehabilitation can provide objective information to facilitate treatment decision making. However, designing a test to be integrated into healthcare services requires considering multiple design factors. The difficulty of integrating a ‘micro-service’ (gait test) within a ‘macro-service’ (healthcare service) has received little attention in the gait analysis literature. It is a challenge that goes beyond the gait analysis case study because service design methods commonly focus on the entire service design (macro-level). Objective This study aims to extract design considerations and generate guidelines to integrate MoCap technology for gait analysis in the hospital rehabilitation setting. Specifically, the aim is to design a gait test to assess the response of the applied treatments through pre- and post-measurement sessions. Methods We focused on patients with spasticity who received botulinum toxin treatment. A qualitative research design was used to investigate the integration of a gait analysis system based on inertial measurement units in a rehabilitation service at a reference hospital. The methodological approach was based on contrasted methodologies from the service design field, which materialise through observation techniques (during system use), semi-structured interviews, and workshops with healthcare professionals (13 patients, 10 ‘proxies’, and 6 doctors). Results The analysis resulted in six themes: (1) patients’ understanding, (2) guiding the gait tests, (3) which professionals guide the gait tests, (4) gait test reports, (5) requesting gait tests (doctors and test guide communication), and the (6) conceptual design of the service with the gait test. Conclusions The extracted design considerations and guidelines increase the applicability and usefulness of the gait analysis technology, improving the link between technologists and healthcare professionals. The proposed methodological approach can also be useful for service design teams that deal with the integration of one service into another.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Background Gait analysis with motion capture (MoCap) during rehabilitation can provide objective information to facilitate treatment decision making. However, designing a test to be integrated into healthcare services requires considering multiple design factors. The difficulty of integrating a ‘micro-service’ (gait test) within a ‘macro-service’ (healthcare service) has received little attention in the gait analysis literature. It is a challenge that goes beyond the gait analysis case study because service design methods commonly focus on the entire service design (macro-level). Objective This study aims to extract design considerations and generate guidelines to integrate MoCap technology for gait analysis in the hospital rehabilitation setting. Specifically, the aim is to design a gait test to assess the response of the applied treatments through pre- and post-measurement sessions. Methods We focused on patients with spasticity who received botulinum toxin treatment. A qualitative research design was used to investigate the integration of a gait analysis system based on inertial measurement units in a rehabilitation service at a reference hospital. The methodological approach was based on contrasted methodologies from the service design field, which materialise through observation techniques (during system use), semi-structured interviews, and workshops with healthcare professionals (13 patients, 10 ‘proxies’, and 6 doctors). Results The analysis resulted in six themes: (1) patients’ understanding, (2) guiding the gait tests, (3) which professionals guide the gait tests, (4) gait test reports, (5) requesting gait tests (doctors and test guide communication), and the (6) conceptual design of the service with the gait test. Conclusions The extracted design considerations and guidelines increase the applicability and usefulness of the gait analysis technology, improving the link between technologists and healthcare professionals. The proposed methodological approach can also be useful for service design teams that deal with the integration of one service into another.
Moreno, Carlos Andres Trasviña; Blasco, Ruben; Casas, Roberto; Marco, Álvaro
Evaluación de la modulación lora en la banda de 433 MHZ para monitorización en exteriores Journal Article
In: DYNA New Technologies, vol. 6, no. 1, pp. 11–p, 2019.
@article{moreno2019evaluacion,
title = {Evaluación de la modulación lora en la banda de 433 MHZ para monitorización en exteriores},
author = {Carlos Andres Trasviña Moreno and Ruben Blasco and Roberto Casas and Álvaro Marco},
year = {2019},
date = {2019-01-01},
journal = {DYNA New Technologies},
volume = {6},
number = {1},
pages = {11–p},
publisher = {Publicaciones DYNA SL},
abstract = {En los últimos años, las Redes de Sensores Inalámbricas, o WSN por sus siglas en inglés, han aumentado su relevancia para la monitorización en exteriores. La creciente necesidad de analizar en tiempo real los espacios abiertos como reservas naturales, campos agrícolas, ciudades inteligentes, etc., han impulsado el desarrollo de nuevas tecnologías de comunicación. Diversos protocolos y técnicas han sido creados para cumplir los requerimientos de distintos escenarios de WSN, sin embargo, la monitorización de exteriores presenta retos distintos y muy característicos que aún no han sido logrados, especialmente cuando se intenta cubrir áreas de gran cobertura con un consumo energético reducido. Las recientemente desarrolladas Low Power Wide Area Networks (LPWAN) buscan llenar este vacío, con la capacidad de transmitir a grandes distancias con un bajo consumo energético. Una de estas LPWAN es la modulación LoRa (Long Range), la cual opera en frecuencias sub-GHz. Para proveer un mayor entendimiento en esta técnica de comunicación inalámbrica, en este artículo se realiza una evaluación de la modulación LoRa, utilizando la banda ISM de 433 MHz. Para esto, se realiza un análisis energético, así como de capacidad y rango de transmisión. Los resultados aportan una mayor comprensión del impacto de cada uno de los parámetros de esta modulación, así como las capacidades que tiene esta tecnología para redes de monitorización para exteriores.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
En los últimos años, las Redes de Sensores Inalámbricas, o WSN por sus siglas en inglés, han aumentado su relevancia para la monitorización en exteriores. La creciente necesidad de analizar en tiempo real los espacios abiertos como reservas naturales, campos agrícolas, ciudades inteligentes, etc., han impulsado el desarrollo de nuevas tecnologías de comunicación. Diversos protocolos y técnicas han sido creados para cumplir los requerimientos de distintos escenarios de WSN, sin embargo, la monitorización de exteriores presenta retos distintos y muy característicos que aún no han sido logrados, especialmente cuando se intenta cubrir áreas de gran cobertura con un consumo energético reducido. Las recientemente desarrolladas Low Power Wide Area Networks (LPWAN) buscan llenar este vacío, con la capacidad de transmitir a grandes distancias con un bajo consumo energético. Una de estas LPWAN es la modulación LoRa (Long Range), la cual opera en frecuencias sub-GHz. Para proveer un mayor entendimiento en esta técnica de comunicación inalámbrica, en este artículo se realiza una evaluación de la modulación LoRa, utilizando la banda ISM de 433 MHz. Para esto, se realiza un análisis energético, así como de capacidad y rango de transmisión. Los resultados aportan una mayor comprensión del impacto de cada uno de los parámetros de esta modulación, así como las capacidades que tiene esta tecnología para redes de monitorización para exteriores.
Blanco, Teresa; Casas, Roberto; Marco, Álvaro; Martínez, Ignacio
Micro ad-hoc Health Social Networks (uHSN). Design and evaluation of a social-based solution for patient support Journal Article
In: Journal of Biomedical Informatics, vol. 89, pp. 68-80, 2019, ISSN: 1532-0464.
@article{BLANCO201968,
title = {Micro ad-hoc Health Social Networks (uHSN). Design and evaluation of a social-based solution for patient support},
author = {Teresa Blanco and Roberto Casas and Álvaro Marco and Ignacio Martínez},
url = {https://www.sciencedirect.com/science/article/pii/S1532046418302181},
doi = {https://doi.org/10.1016/j.jbi.2018.11.009},
issn = {1532-0464},
year = {2019},
date = {2019-01-01},
journal = {Journal of Biomedical Informatics},
volume = {89},
pages = {68-80},
abstract = {Objective
To contribute the design, development, and assessment of a new concept: Micro ad hoc Health Social Networks (uHSN), to create a social-based solution for supporting patients with chronic disease.
Design
After in-depth fieldwork and intensive co-design over a 4-year project following Community-Based Participatory Research (CBPR), this paper contributes a new paradigm of uHSN, defining two interaction areas (the “backstage”, the sphere invisible to the final user, where processes that build services take place; and the “onstage”, the visible part that includes the patients and relatives), and describes a new transversal concept, i.e., “network spaces segments,” to provide timely interaction among all involved profiles and guaranteeing qualitative relationships. This proposal is applicable to any service design project and to all types of work areas; in the present work, it served as a social-based solution for supporting patients with chronic disease in two real-life health scenarios: a Parkinson disease patient association and a Stroke rehabilitation service in a hospital. These two scenarios included the following main features: thematic (related to the specific disease), private, and secure (only for the patient, relatives, healthcare professional, therapist, carer), with defined specific objectives (around patient support), small size (from tens to hundreds of users), ability to integrate innovative services (e.g., connection to hospital information service or to health sensors), supported by local therapeutic associations, and clustered with preconfigured relationships among users based in network groups.
Measurements
Using a mixed qualitative and quantitative approach for 6 months, the performance of the uHSN was assessed in the two environments: a hospital rehabilitation unit working with Stroke patients, and a Parkinson disease association providing physiotherapy, occupational therapy, psychological support, speech therapy, and social services. We describe the proposed methods for evaluating the uHSN quantitatively and qualitatively, and how the scientific community can replicate and/or integrate this contribution in its research.
Results
The uHSN overcomes the main limitations of traditional HSNs in the main areas recommended in the literature: privacy, security, transparency, system ecology, Quality of Service (QoS), and technology enhancement. The qualitative and quantitative research demonstrated its viability and replicability in four key points: user acceptance, productivity improvement, QoS enhancement, and fostering of social relations. It also meets the expectation of connecting health and social worlds, supporting distance rehabilitation, improving professionals’ efficiency, expanding users’ social capital, improving information quality and immediacy, and enhancing perceived peer/social/emotional support. The scientific contributions of the present paper are the first step not only in customizing health solutions that empower patients, their families, and healthcare professionals, but also in transferring this new paradigm to other scientific, professional, and social environments to create new opportunities.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Objective
To contribute the design, development, and assessment of a new concept: Micro ad hoc Health Social Networks (uHSN), to create a social-based solution for supporting patients with chronic disease.
Design
After in-depth fieldwork and intensive co-design over a 4-year project following Community-Based Participatory Research (CBPR), this paper contributes a new paradigm of uHSN, defining two interaction areas (the “backstage”, the sphere invisible to the final user, where processes that build services take place; and the “onstage”, the visible part that includes the patients and relatives), and describes a new transversal concept, i.e., “network spaces segments,” to provide timely interaction among all involved profiles and guaranteeing qualitative relationships. This proposal is applicable to any service design project and to all types of work areas; in the present work, it served as a social-based solution for supporting patients with chronic disease in two real-life health scenarios: a Parkinson disease patient association and a Stroke rehabilitation service in a hospital. These two scenarios included the following main features: thematic (related to the specific disease), private, and secure (only for the patient, relatives, healthcare professional, therapist, carer), with defined specific objectives (around patient support), small size (from tens to hundreds of users), ability to integrate innovative services (e.g., connection to hospital information service or to health sensors), supported by local therapeutic associations, and clustered with preconfigured relationships among users based in network groups.
Measurements
Using a mixed qualitative and quantitative approach for 6 months, the performance of the uHSN was assessed in the two environments: a hospital rehabilitation unit working with Stroke patients, and a Parkinson disease association providing physiotherapy, occupational therapy, psychological support, speech therapy, and social services. We describe the proposed methods for evaluating the uHSN quantitatively and qualitatively, and how the scientific community can replicate and/or integrate this contribution in its research.
Results
The uHSN overcomes the main limitations of traditional HSNs in the main areas recommended in the literature: privacy, security, transparency, system ecology, Quality of Service (QoS), and technology enhancement. The qualitative and quantitative research demonstrated its viability and replicability in four key points: user acceptance, productivity improvement, QoS enhancement, and fostering of social relations. It also meets the expectation of connecting health and social worlds, supporting distance rehabilitation, improving professionals’ efficiency, expanding users’ social capital, improving information quality and immediacy, and enhancing perceived peer/social/emotional support. The scientific contributions of the present paper are the first step not only in customizing health solutions that empower patients, their families, and healthcare professionals, but also in transferring this new paradigm to other scientific, professional, and social environments to create new opportunities.
To contribute the design, development, and assessment of a new concept: Micro ad hoc Health Social Networks (uHSN), to create a social-based solution for supporting patients with chronic disease.
Design
After in-depth fieldwork and intensive co-design over a 4-year project following Community-Based Participatory Research (CBPR), this paper contributes a new paradigm of uHSN, defining two interaction areas (the “backstage”, the sphere invisible to the final user, where processes that build services take place; and the “onstage”, the visible part that includes the patients and relatives), and describes a new transversal concept, i.e., “network spaces segments,” to provide timely interaction among all involved profiles and guaranteeing qualitative relationships. This proposal is applicable to any service design project and to all types of work areas; in the present work, it served as a social-based solution for supporting patients with chronic disease in two real-life health scenarios: a Parkinson disease patient association and a Stroke rehabilitation service in a hospital. These two scenarios included the following main features: thematic (related to the specific disease), private, and secure (only for the patient, relatives, healthcare professional, therapist, carer), with defined specific objectives (around patient support), small size (from tens to hundreds of users), ability to integrate innovative services (e.g., connection to hospital information service or to health sensors), supported by local therapeutic associations, and clustered with preconfigured relationships among users based in network groups.
Measurements
Using a mixed qualitative and quantitative approach for 6 months, the performance of the uHSN was assessed in the two environments: a hospital rehabilitation unit working with Stroke patients, and a Parkinson disease association providing physiotherapy, occupational therapy, psychological support, speech therapy, and social services. We describe the proposed methods for evaluating the uHSN quantitatively and qualitatively, and how the scientific community can replicate and/or integrate this contribution in its research.
Results
The uHSN overcomes the main limitations of traditional HSNs in the main areas recommended in the literature: privacy, security, transparency, system ecology, Quality of Service (QoS), and technology enhancement. The qualitative and quantitative research demonstrated its viability and replicability in four key points: user acceptance, productivity improvement, QoS enhancement, and fostering of social relations. It also meets the expectation of connecting health and social worlds, supporting distance rehabilitation, improving professionals’ efficiency, expanding users’ social capital, improving information quality and immediacy, and enhancing perceived peer/social/emotional support. The scientific contributions of the present paper are the first step not only in customizing health solutions that empower patients, their families, and healthcare professionals, but also in transferring this new paradigm to other scientific, professional, and social environments to create new opportunities.
Conferences
Pastor-Flores, P; Brío, Bonifacio Martín; Bono, Antonio; Ruiz, C Bernal; Gorrachategui, I Sanz; Pérez-Cebolla, FJ
Clasificación de patrones de envejecimiento en baterías mediante SOM Conference
2019.
@conference{pastorclasificacion,
title = {Clasificación de patrones de envejecimiento en baterías mediante SOM},
author = {P Pastor-Flores and Bonifacio Martín Brío and Antonio Bono and C Bernal Ruiz and I Sanz Gorrachategui and FJ Pérez-Cebolla},
year = {2019},
date = {2019-07-03},
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Proceedings Articles
Pérez-Cebolla, Francisco Jose; Martinez-Iturbe, Abelardo; Brío, Bonifacio Martín; Bernal-Ruiz, Carlos; Artal-Sevil, Jesús Sergio; Pastor-Flores, Pablo
Nonlinear Dynamic Equivalent Circuit of a Switched Reluctance Motor Considering Core Losses and Leakage Inductance Proceedings Article
In: IECON 2019 – 45th Annual Conference of the IEEE Industrial Electronics Society, pp. 1222-1227, 2019, ISSN: 2577-1647.
@inproceedings{8927236,
title = {Nonlinear Dynamic Equivalent Circuit of a Switched Reluctance Motor Considering Core Losses and Leakage Inductance},
author = {Francisco Jose Pérez-Cebolla and Abelardo Martinez-Iturbe and Bonifacio Martín Brío and Carlos Bernal-Ruiz and Jesús Sergio Artal-Sevil and Pablo Pastor-Flores},
doi = {10.1109/IECON.2019.8927236},
issn = {2577-1647},
year = {2019},
date = {2019-10-01},
booktitle = {IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society},
volume = {1},
pages = {1222-1227},
abstract = {In this paper a nonlinear dynamic lumped circuit model of a switched reluctance motor is proposed. This model includes the effect of core losses and leakage inductance. The parameters of the nonlinear circuit are identified from the experimental flux linkage and phase current. The proposed model, compared to other available static models, allows the coupling between electrical and mechanical phenomena and, therefore, it is suitable for the characterization of the full rotating behaviour of the motor. This nonlinear model is based on the space-state framework and it is implemented in Matlab-Simulink. Model accuracy has been verified at both, constant speed and accelerating; the correct fit between the model and a real switched reluctance machine is shown. The accurate fit of the stator waveform obtained in model simulations with experimental measurements proves both, the accuracy of the proposed model and the correct estimation of its components. All these parameters are non-linearly dependent on the current and the actual rotor position.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In this paper a nonlinear dynamic lumped circuit model of a switched reluctance motor is proposed. This model includes the effect of core losses and leakage inductance. The parameters of the nonlinear circuit are identified from the experimental flux linkage and phase current. The proposed model, compared to other available static models, allows the coupling between electrical and mechanical phenomena and, therefore, it is suitable for the characterization of the full rotating behaviour of the motor. This nonlinear model is based on the space-state framework and it is implemented in Matlab-Simulink. Model accuracy has been verified at both, constant speed and accelerating; the correct fit between the model and a real switched reluctance machine is shown. The accurate fit of the stator waveform obtained in model simulations with experimental measurements proves both, the accuracy of the proposed model and the correct estimation of its components. All these parameters are non-linearly dependent on the current and the actual rotor position.
Pastor-Flores, Pablo; Bernal-Ruiz, Carlos; Sanz-Gorrachategui, Iván; Bono, Antonio; Brío, Bonifacio Martín; Artal-Sevil, Jesús Sergio; Perez-Cebolla, Francisco J
Analysis of Li-ion battery degradation using self-organizing maps Proceedings Article
In: IECON 2019 – 45th Annual Conference of the IEEE Industrial Electronics Society, pp. 4525-4530, 2019, ISSN: 2577-1647.
@inproceedings{8926907,
title = {Analysis of Li-ion battery degradation using self-organizing maps},
author = {Pablo Pastor-Flores and Carlos Bernal-Ruiz and Iván Sanz-Gorrachategui and Antonio Bono and Bonifacio Martín Brío and Jesús Sergio Artal-Sevil and Francisco J Perez-Cebolla},
doi = {10.1109/IECON.2019.8926907},
issn = {2577-1647},
year = {2019},
date = {2019-10-01},
booktitle = {IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society},
volume = {1},
pages = {4525-4530},
abstract = {This paper proposes a new methodology to identify the different degradation processes of Li-Ion battery cells. The goal of this study is to determine if different degradation factors can be separated by waveform analysis from aged cells with similar remaining capacity. In contrast to other works, the proposed method identifies the past operating conditions in the cell, regardless of the actual State of Health. The methodology is based on a data-driven approach by using a SOM (Self-organizing map), an unsupervised neural network. To verify the hypothesis a SOM has been trained with laboratory data from whole data cycles, to classify cells concerning their degradation path and according to their discharge voltage patterns. Additionally, this new methodology based on the SOM allows discriminating groups of cells with different cycling conditions (based on depth of discharge, ambient temperature and discharge current). This research line is very promising for classification of used cells, not only depending on their current static parameters (capacity, impedance), but also the battery use in their past life. This will allow making predictions of the Remaining Useful Life (RUL) of a battery with greater precision.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
This paper proposes a new methodology to identify the different degradation processes of Li-Ion battery cells. The goal of this study is to determine if different degradation factors can be separated by waveform analysis from aged cells with similar remaining capacity. In contrast to other works, the proposed method identifies the past operating conditions in the cell, regardless of the actual State of Health. The methodology is based on a data-driven approach by using a SOM (Self-organizing map), an unsupervised neural network. To verify the hypothesis a SOM has been trained with laboratory data from whole data cycles, to classify cells concerning their degradation path and according to their discharge voltage patterns. Additionally, this new methodology based on the SOM allows discriminating groups of cells with different cycling conditions (based on depth of discharge, ambient temperature and discharge current). This research line is very promising for classification of used cells, not only depending on their current static parameters (capacity, impedance), but also the battery use in their past life. This will allow making predictions of the Remaining Useful Life (RUL) of a battery with greater precision.
Villa, Jorge; Mur, Alberto; Artigas, Jose I; Barragan, Luis A; Urriza, Isidro; Navarro, Denis
Output voltage estimation of a half-bridge inverter for domestic induction heating applications Proceedings Article
In: IECON 2019 – 45th Annual Conference of the IEEE Industrial Electronics Society, pp. 5081-5086, 2019, ISSN: 2577-1647.
@inproceedings{8926617,
title = {Output voltage estimation of a half-bridge inverter for domestic induction heating applications},
author = {Jorge Villa and Alberto Mur and Jose I Artigas and Luis A Barragan and Isidro Urriza and Denis Navarro},
doi = {10.1109/IECON.2019.8926617},
issn = {2577-1647},
year = {2019},
date = {2019-10-01},
booktitle = {IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society},
volume = {1},
pages = {5081-5086},
abstract = {The power supplied to a vessel by a domestic induction-heating appliance is strongly dependent on several parameters the designer of the system has no control over: the type and the size of the vessel, misalignments between the pot and the inductor, temperatures, etc. A reliable estimation of the power is essential to ensure that the home appliance works under the expected conditions and the user experience is suitable. Furthermore, any reduction of hardware is totally welcome by consumer-electronics manufacturers. In this work, two methods to estimate the output voltage of a half-bridge inverter without digitizing it with an analog-to-digital converter are proposed and the effects that this estimation has on the power calculation are evaluated. Both methods are implemented and experimentally verified in a real prototype with an FPGA (Field-Programmable Gate Array).},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
The power supplied to a vessel by a domestic induction-heating appliance is strongly dependent on several parameters the designer of the system has no control over: the type and the size of the vessel, misalignments between the pot and the inductor, temperatures, etc. A reliable estimation of the power is essential to ensure that the home appliance works under the expected conditions and the user experience is suitable. Furthermore, any reduction of hardware is totally welcome by consumer-electronics manufacturers. In this work, two methods to estimate the output voltage of a half-bridge inverter without digitizing it with an analog-to-digital converter are proposed and the effects that this estimation has on the power calculation are evaluated. Both methods are implemented and experimentally verified in a real prototype with an FPGA (Field-Programmable Gate Array).
Camal, Luis; Kirtane, Anup; Blanco, Teresa; Casas, Roberto; Rossano, Federico; Aksanli, Baris
A Wearable Device Network to Track Animal Behavior and Relationships in the Wild Proceedings Article
In: 2019 IEEE 10th Annual Ubiquitous Computing, Electronics Mobile Communication Conference (UEMCON), pp. 0198-0202, 2019.
@inproceedings{8992986,
title = {A Wearable Device Network to Track Animal Behavior and Relationships in the Wild},
author = {Luis Camal and Anup Kirtane and Teresa Blanco and Roberto Casas and Federico Rossano and Baris Aksanli},
doi = {10.1109/UEMCON47517.2019.8992986},
year = {2019},
date = {2019-10-01},
booktitle = {2019 IEEE 10th Annual Ubiquitous Computing, Electronics Mobile Communication Conference (UEMCON)},
pages = {0198-0202},
abstract = {The advancements in sensor technology have made it possible to design wearable devices specifically designed for animals. These wearable devices can be used for locating individual animals, monitor their status, and track their trajectories in the wild. Some animal groups (such as chimpanzees) exhibit complex group behavior and these group dynamics play an important role in the physical and mental health of the animals. Scientists have traditionally been monitoring group dynamics manually in the wild. This requires extensive field trips, costing a lot of time and money. This calls for using the recent developments in technology, such as smart wearable devices for this purpose. However, lack of infrastructure support (limited connectivity, limited power, etc.) in the wilderness makes this a tedious task. In this work-in-progress paper, we present our technological approach and how we address the issues of wilderness to study animal behavior. We demonstrate how we build a network of lightweight wearable devices, and how the digital output of these devices can be used to analyze animal relationship. We show an initial, exploratory experiment, outlining the capabilities of the devices and technologies used in terms of communication efficiency, and the potential of the devices that can be used in the wilderness. Our initial results show that up to 90% of the proximity-based interactions can be captured.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
The advancements in sensor technology have made it possible to design wearable devices specifically designed for animals. These wearable devices can be used for locating individual animals, monitor their status, and track their trajectories in the wild. Some animal groups (such as chimpanzees) exhibit complex group behavior and these group dynamics play an important role in the physical and mental health of the animals. Scientists have traditionally been monitoring group dynamics manually in the wild. This requires extensive field trips, costing a lot of time and money. This calls for using the recent developments in technology, such as smart wearable devices for this purpose. However, lack of infrastructure support (limited connectivity, limited power, etc.) in the wilderness makes this a tedious task. In this work-in-progress paper, we present our technological approach and how we address the issues of wilderness to study animal behavior. We demonstrate how we build a network of lightweight wearable devices, and how the digital output of these devices can be used to analyze animal relationship. We show an initial, exploratory experiment, outlining the capabilities of the devices and technologies used in terms of communication efficiency, and the potential of the devices that can be used in the wilderness. Our initial results show that up to 90% of the proximity-based interactions can be captured.
Mizquez, Luis; Lobato-Morales, Humberto; Chávez-Pérez, RA; Medina-Monroy, JL
RF/Microwave Energy Harvesting System in a Front-End using a Directional Filter Proceedings Article
In: 2019 International Conference on Electronics, Communications and Computers (CONIELECOMP), pp. 27-30, 2019, ISSN: 2474-9044.
@inproceedings{8673148,
title = {RF/Microwave Energy Harvesting System in a Front-End using a Directional Filter},
author = {Luis Mizquez and Humberto Lobato-Morales and RA Chávez-Pérez and JL Medina-Monroy},
doi = {10.1109/CONIELECOMP.2019.8673148},
issn = {2474-9044},
year = {2019},
date = {2019-02-01},
booktitle = {2019 International Conference on Electronics, Communications and Computers (CONIELECOMP)},
pages = {27-30},
abstract = {A novel design of an RF/microwave energy harvesting circuit making use of a directional filter for front-end system implementation is presented in this paper. The proposed setup consists of a rectifying circuit fed by the rejectband output port of a planar directional filter, using a microstrip resonator as the matching network. This particular configuration allows the overall reflection to be suppressed without affecting the passband channel, which is an important issue for any communications front-end performance. Design of all the stages are presented, and simulated and measured responses are shown as well as the obtained DC voltage levels from the rectifying circuit.},
keywords = {},
pubstate = {published},
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A novel design of an RF/microwave energy harvesting circuit making use of a directional filter for front-end system implementation is presented in this paper. The proposed setup consists of a rectifying circuit fed by the rejectband output port of a planar directional filter, using a microstrip resonator as the matching network. This particular configuration allows the overall reflection to be suppressed without affecting the passband channel, which is an important issue for any communications front-end performance. Design of all the stages are presented, and simulated and measured responses are shown as well as the obtained DC voltage levels from the rectifying circuit.
Orrite, Carlos; Herrero, Elias; Valencia, Mauricio
From Features to Attribute Graphs for Point Set Registration Proceedings Article
In: Morales, Aythami; Fierrez, Julian; Sánchez, José Salvador; Ribeiro, Bernardete (Ed.): Pattern Recognition and Image Analysis, pp. 437–448, Springer International Publishing, Cham, 2019, ISBN: 978-3-030-31332-6.
@inproceedings{10.1007/978-3-030-31332-6_38,
title = {From Features to Attribute Graphs for Point Set Registration},
author = {Carlos Orrite and Elias Herrero and Mauricio Valencia},
editor = {Aythami Morales and Julian Fierrez and José Salvador Sánchez and Bernardete Ribeiro},
isbn = {978-3-030-31332-6},
year = {2019},
date = {2019-01-01},
booktitle = {Pattern Recognition and Image Analysis},
pages = {437–448},
publisher = {Springer International Publishing},
address = {Cham},
abstract = {The traditional approach for point set registration is based on matching feature descriptors between the target object and the query image and then the fundamental matrix is calculated robustly using RANSAC to align the target in the image. However, this approach can easily fail in the presence of occlusion, background clutter and changes in scale and camera viewpoint, being the RANSAC algorithm unable to filter out many outliers. In our proposal the target is represented by an attribute graph, where its vertices represent salient features describing the target object and its edges encode their spatial relationships. The matched keypoints between the attribute graph and the descriptors in the query image are filtered taking into account features such as orientation and scale, as well as the structure of the graph. Preliminary results using the Stanford Mobile Visual search data set and the Stanford Streaming Mobile Augmented Reality Dataset show the best behaviour of our proposal in valid matches and lower computational cost in relation to the standard approach based on RANSAC.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
The traditional approach for point set registration is based on matching feature descriptors between the target object and the query image and then the fundamental matrix is calculated robustly using RANSAC to align the target in the image. However, this approach can easily fail in the presence of occlusion, background clutter and changes in scale and camera viewpoint, being the RANSAC algorithm unable to filter out many outliers. In our proposal the target is represented by an attribute graph, where its vertices represent salient features describing the target object and its edges encode their spatial relationships. The matched keypoints between the attribute graph and the descriptors in the query image are filtered taking into account features such as orientation and scale, as well as the structure of the graph. Preliminary results using the Stanford Mobile Visual search data set and the Stanford Streaming Mobile Augmented Reality Dataset show the best behaviour of our proposal in valid matches and lower computational cost in relation to the standard approach based on RANSAC.
Gallardo, Jesús; López, Carmelo; Aguelo, Antonio; Cebrián, Belén; Coma, Teresa; Cerezo, Eva
Development of a Pervasive Game for ADHD Children Proceedings Article
In: Brooks, Anthony L; Brooks, Eva; Sylla, Cristina (Ed.): Interactivity, Game Creation, Design, Learning, and Innovation, pp. 526–531, Springer International Publishing, Cham, 2019, ISBN: 978-3-030-06134-0.
@inproceedings{10.1007/978-3-030-06134-0_56,
title = {Development of a Pervasive Game for ADHD Children},
author = {Jesús Gallardo and Carmelo López and Antonio Aguelo and Belén Cebrián and Teresa Coma and Eva Cerezo},
editor = {Anthony L Brooks and Eva Brooks and Cristina Sylla},
isbn = {978-3-030-06134-0},
year = {2019},
date = {2019-01-01},
booktitle = {Interactivity, Game Creation, Design, Learning, and Innovation},
pages = {526–531},
publisher = {Springer International Publishing},
address = {Cham},
abstract = {The field of pervasive games is gaining importance in the last times. These games are characterized by exceeding the usual dimensions of time, space and social component that are present in traditional games. These games are usually played in an interactive space, in which several user interfaces following a multimodal approach work together to obtain the pervasive game experience. Pervasive games have proven to be useful in several fields, including the educational one. Here, we introduce The Fantastic Journey, a pervasive game directed towards children with Attention Deficit Hyperactivity Disorder. The game has been designed with the help of pedagogues so that it really matches some educational goals. The game is made up of some missions that integrate different kinds of interaction: gestural, tangible, etc. The game has been developed following a methodological approach developed as a previous work. In this paper, the main features of the game, focusing on its different missions and their educational goals, are explained.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
The field of pervasive games is gaining importance in the last times. These games are characterized by exceeding the usual dimensions of time, space and social component that are present in traditional games. These games are usually played in an interactive space, in which several user interfaces following a multimodal approach work together to obtain the pervasive game experience. Pervasive games have proven to be useful in several fields, including the educational one. Here, we introduce The Fantastic Journey, a pervasive game directed towards children with Attention Deficit Hyperactivity Disorder. The game has been designed with the help of pedagogues so that it really matches some educational goals. The game is made up of some missions that integrate different kinds of interaction: gestural, tangible, etc. The game has been developed following a methodological approach developed as a previous work. In this paper, the main features of the game, focusing on its different missions and their educational goals, are explained.
Technical Reports
Calavia, Belén; Blanco, Teresa; Casas, Roberto
Recursos basados en el diseño para fomentar la creatividad en el aula Technical Report
2019.
@techreport{calavia2019recursos,
title = {Recursos basados en el diseño para fomentar la creatividad en el aula},
author = {Belén Calavia and Teresa Blanco and Roberto Casas},
doi = {10.26754/CINAIC.2019.0120},
year = {2019},
date = {2019-01-01},
booktitle = {V Congreso Internacional sobre Aprendizaje, Innovación y Competitividad (CINAIC 2019)},
pages = {590-595},
abstract = {En los últimos años se ha incrementado el interés en formar a los alumnos en competencias transversales como la creatividad. Sin embargo, dicho enfoque no siempre se traduce a nivel práctico; porqué las escuelas no producen personas más creativas es una pregunta que actualmente no tiene respuesta. Un posible foco de actuación es el desarrollo de nuevos recursos que conecten a docentes y alumnos dentro del entorno educativo. En este artículo se presenta una experiencia de aprendizaje en el ámbito de secundaria a partir de una nueva metodología basada en el pensamiento de diseño, y destinada a contribuir en la formación de individuos más creativos. Se concluye que la metodología desarrollada se integra positivamente en el currículo, y es reconocida de gran ayuda para fomentar la creatividad en las escuelas. Asimismo, se evidencia la oportunidad que tiene el campo de la ingeniería de diseño en este y en otros posibles entornos educativos.},
keywords = {},
pubstate = {published},
tppubtype = {techreport}
}
En los últimos años se ha incrementado el interés en formar a los alumnos en competencias transversales como la creatividad. Sin embargo, dicho enfoque no siempre se traduce a nivel práctico; porqué las escuelas no producen personas más creativas es una pregunta que actualmente no tiene respuesta. Un posible foco de actuación es el desarrollo de nuevos recursos que conecten a docentes y alumnos dentro del entorno educativo. En este artículo se presenta una experiencia de aprendizaje en el ámbito de secundaria a partir de una nueva metodología basada en el pensamiento de diseño, y destinada a contribuir en la formación de individuos más creativos. Se concluye que la metodología desarrollada se integra positivamente en el currículo, y es reconocida de gran ayuda para fomentar la creatividad en las escuelas. Asimismo, se evidencia la oportunidad que tiene el campo de la ingeniería de diseño en este y en otros posibles entornos educativos.
2018
Journal Articles
Bono, Antonio; Brío, Bonifacio Martín; Bernal-Ruiz, Carlos; Perez-Cebolla, Francisco Jose; Martinez-Iturbe, Abelardo; Sanz-Gorrachategui, Ivan
The Inductor as a Smart Sensor for Material Identification in Domestic Induction Cooking Journal Article
In: IEEE Sensors Journal, vol. 18, no. 6, pp. 2462-2470, 2018, ISSN: 1558-1748.
@article{8264711,
title = {The Inductor as a Smart Sensor for Material Identification in Domestic Induction Cooking},
author = {Antonio Bono and Bonifacio Martín Brío and Carlos Bernal-Ruiz and Francisco Jose Perez-Cebolla and Abelardo Martinez-Iturbe and Ivan Sanz-Gorrachategui},
doi = {10.1109/JSEN.2018.2795739},
issn = {1558-1748},
year = {2018},
date = {2018-03-01},
journal = {IEEE Sensors Journal},
volume = {18},
number = {6},
pages = {2462-2470},
abstract = {In induction home appliances, the characterization of the physical properties of the vessel allows for better control strategies and new cooking functionalities. Current modelling techniques calculate a simple R-L equivalent circuit that models the inductor impedance taking into account all the physical coupling parameters, but these techniques do not allow to directly extract the physical parameters, such as vessel material. In this paper, a new methodology for online detection of the pot material is presented. On this approach, the inductor included in the hob simultaneously serves as heating element and sensor. First, harmonic impedances are calculated by spectral estimation from the currents and voltages waveforms recorded at the inductor. Then, a feature set, including four harmonic impedances and the power factor, is processed by machine learning algorithms for the identification of the pot material. The material identification system is implemented onto an embedded processor similar to those included in current induction hobs; thus, smart sensing features are incorporated onto a domestic cooker without using additional sensors, at no additional cost.},
keywords = {},
pubstate = {published},
tppubtype = {article}
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In induction home appliances, the characterization of the physical properties of the vessel allows for better control strategies and new cooking functionalities. Current modelling techniques calculate a simple R-L equivalent circuit that models the inductor impedance taking into account all the physical coupling parameters, but these techniques do not allow to directly extract the physical parameters, such as vessel material. In this paper, a new methodology for online detection of the pot material is presented. On this approach, the inductor included in the hob simultaneously serves as heating element and sensor. First, harmonic impedances are calculated by spectral estimation from the currents and voltages waveforms recorded at the inductor. Then, a feature set, including four harmonic impedances and the power factor, is processed by machine learning algorithms for the identification of the pot material. The material identification system is implemented onto an embedded processor similar to those included in current induction hobs; thus, smart sensing features are incorporated onto a domestic cooker without using additional sensors, at no additional cost.
Sanz-Gorrachategui, Iván; Bernal, Carlos; Oyarbide, Estanis; Garayalde, Erik; Aizpuru, Iosu; Canales, Jose María; Bono, Antonio
New battery model considering thermal transport and partial charge stationary effects in photovoltaic off-grid applications Journal Article
In: Journal of Power Sources, vol. 378, pp. 311-321, 2018, ISSN: 0378-7753.
@article{SANZGORRACHATEGUI2018311,
title = {New battery model considering thermal transport and partial charge stationary effects in photovoltaic off-grid applications},
author = {Iván Sanz-Gorrachategui and Carlos Bernal and Estanis Oyarbide and Erik Garayalde and Iosu Aizpuru and Jose María Canales and Antonio Bono},
url = {https://www.sciencedirect.com/science/article/pii/S037877531731666X},
doi = {https://doi.org/10.1016/j.jpowsour.2017.12.058},
issn = {0378-7753},
year = {2018},
date = {2018-01-01},
journal = {Journal of Power Sources},
volume = {378},
pages = {311-321},
abstract = {The optimization of the battery pack in an off-grid Photovoltaic application must consider the minimum sizing that assures the availability of the system under the worst environmental conditions. Thus, it is necessary to predict the evolution of the state of charge of the battery under incomplete daily charging and discharging processes and fluctuating temperatures over day-night cycles. Much of previous development work has been carried out in order to model the short term evolution of battery variables. Many works focus on the on-line parameter estimation of available charge, using standard or advanced estimators, but they are not focused on the development of a model with predictive capabilities. Moreover, normally stable environmental conditions and standard charge-discharge patterns are considered. As the actual cycle-patterns differ from the manufacturer's tests, batteries fail to perform as expected. This paper proposes a novel methodology to model these issues, with predictive capabilities to estimate the remaining charge in a battery after several solar cycles. A new non-linear state space model is proposed as a basis, and the methodology to feed and train the model is introduced. The new methodology is validated using experimental data, providing only 5% of error at higher temperatures than the nominal one.},
keywords = {},
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The optimization of the battery pack in an off-grid Photovoltaic application must consider the minimum sizing that assures the availability of the system under the worst environmental conditions. Thus, it is necessary to predict the evolution of the state of charge of the battery under incomplete daily charging and discharging processes and fluctuating temperatures over day-night cycles. Much of previous development work has been carried out in order to model the short term evolution of battery variables. Many works focus on the on-line parameter estimation of available charge, using standard or advanced estimators, but they are not focused on the development of a model with predictive capabilities. Moreover, normally stable environmental conditions and standard charge-discharge patterns are considered. As the actual cycle-patterns differ from the manufacturer’s tests, batteries fail to perform as expected. This paper proposes a novel methodology to model these issues, with predictive capabilities to estimate the remaining charge in a battery after several solar cycles. A new non-linear state space model is proposed as a basis, and the methodology to feed and train the model is introduced. The new methodology is validated using experimental data, providing only 5% of error at higher temperatures than the nominal one.
Calavia, Belén; Blanco, Teresa; Casas, Roberto
Analizando el desarrollo de la creatividad en entornos educativos. Una herramienta metodológica basada en el diseño. Journal Article
In: Jornada de Jóvenes Investigadores del I3A, vol. 6, 2018.
@article{ferrandez2018analizando,
title = {Analizando el desarrollo de la creatividad en entornos educativos. Una herramienta metodológica basada en el diseño.},
author = {Belén Calavia and Teresa Blanco and Roberto Casas},
doi = {10.26754/jji-i3a.201802841},
year = {2018},
date = {2018-01-01},
journal = {Jornada de Jóvenes Investigadores del I3A},
volume = {6},
abstract = {Ante la necesidad detectada de aplicar la creatividad en los colegios, se aborda el diseño y desarrollo de un kit basado en el aprendizaje por retos, que busca fomentar los principales factores de la creatividad. Está formado por un conjunto de herramientas abiertas, accesibles e intuitivas basadas en el diseño, las cuales conectan los contenidos con los intereses y la realidad del alumno, generando nuevas posibilidades de aprendizaje competencial.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
Ante la necesidad detectada de aplicar la creatividad en los colegios, se aborda el diseño y desarrollo de un kit basado en el aprendizaje por retos, que busca fomentar los principales factores de la creatividad. Está formado por un conjunto de herramientas abiertas, accesibles e intuitivas basadas en el diseño, las cuales conectan los contenidos con los intereses y la realidad del alumno, generando nuevas posibilidades de aprendizaje competencial.
Blanco, Teresa; Casas, Roberto; Asensio, Ángel; Tamargo, Adriana
Diseño de la gestión del ciclo del agua en pequeños núcleos urbanos mediante design thinking. Journal Article
In: DYNA-Ingeniería e Industria, vol. 93, no. 1, 2018.
@article{blanco2018diseno,
title = {Diseño de la gestión del ciclo del agua en pequeños núcleos urbanos mediante design thinking.},
author = {Teresa Blanco and Roberto Casas and Ángel Asensio and Adriana Tamargo},
doi = {10.6036/8240 pubstate = published},
year = {2018},
date = {2018-01-01},
journal = {DYNA-Ingeniería e Industria},
volume = {93},
number = {1},
abstract = {En el presente artículo se estudia la problemática de la gestión del agua en pequeños núcleos urbanos no tecnificados. Este escenario presenta una alta complejidad tanto de usuarios como de entorno combinada con la dificultad para recurrir a tecnologías de mercado por cuestiones presupuestarias. Basado en métodos de diseño, y con un planteamiento metodológico iterativo y diseñado ad hoc con técnicas que permiten una profundización incremental (personas, shadowing, necesidades relacionales, etc.) se desarrolla un conocimiento profundo de los diferentes escenarios, procesos, usuarios y tecnologías involucradas. Sacando a la luz información latente a priori no especificada, sintetizando y estructurando una gran cantidad de información de tal modo que sea usable a la hora de diseñar las posibles soluciones, se identifican necesidades comunes a escenarios y usuarios muy diferentes entre sí y se mejora la comunicación y el entendimiento entre especialidades diversas. En definitiva, las subsiguientes fases de diseño y desarrollo de la solución se afrontan con una garantía mucho mayor de éxito en términos de viabilidad técnica y comercial. Palabras clave: Design Thinking, multidisciplinaridad, gestión del agua, metodologías de diseño, codiseño, Personas, shadowing…},
keywords = {},
pubstate = {published},
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En el presente artículo se estudia la problemática de la gestión del agua en pequeños núcleos urbanos no tecnificados. Este escenario presenta una alta complejidad tanto de usuarios como de entorno combinada con la dificultad para recurrir a tecnologías de mercado por cuestiones presupuestarias. Basado en métodos de diseño, y con un planteamiento metodológico iterativo y diseñado ad hoc con técnicas que permiten una profundización incremental (personas, shadowing, necesidades relacionales, etc.) se desarrolla un conocimiento profundo de los diferentes escenarios, procesos, usuarios y tecnologías involucradas. Sacando a la luz información latente a priori no especificada, sintetizando y estructurando una gran cantidad de información de tal modo que sea usable a la hora de diseñar las posibles soluciones, se identifican necesidades comunes a escenarios y usuarios muy diferentes entre sí y se mejora la comunicación y el entendimiento entre especialidades diversas. En definitiva, las subsiguientes fases de diseño y desarrollo de la solución se afrontan con una garantía mucho mayor de éxito en términos de viabilidad técnica y comercial. Palabras clave: Design Thinking, multidisciplinaridad, gestión del agua, metodologías de diseño, codiseño, Personas, shadowing…
Piedrafita, Ramón; Béjar, Rubén; Blasco, Rubén; Marco, Alvaro; Zarazaga-Soria, Javier F
The digital ‘connected’ earth: open technology for providing location-based services on degraded communication environments Journal Article
In: International Journal of Digital Earth, vol. 11, no. 8, pp. 761-782, 2018.
@article{doi:10.1080/17538947.2017.1356387,
title = {The digital ‘connected’ earth: open technology for providing location-based services on degraded communication environments},
author = {Ramón Piedrafita and Rubén Béjar and Rubén Blasco and Alvaro Marco and Javier F Zarazaga-Soria},
url = {https://doi.org/10.1080/17538947.2017.1356387},
doi = {10.1080/17538947.2017.1356387},
year = {2018},
date = {2018-01-01},
journal = {International Journal of Digital Earth},
volume = {11},
number = {8},
pages = {761-782},
publisher = {Taylor & Francis},
abstract = {In the current world, it is easy to listen that everybody and everything is connected. Over this connected world, the concept of location-based services has grown in order to provide digital services in everyplace and at every time. Nevertheless, this is not 100% true because the connection is not guaranteed for many people and in many places. These are the Degraded Communications Environments (DCE), environments where the availability of high-speed communications is not guaranteed in at least the 75% of the time. This paper works over the experience of a previous work in developing light protocols that do not need broadband for communication. This work provides an extension of these protocols for the inclusion of mobile devices as elements of the communication process and a set of libraries to allow the development of applications in DCE. The work done has involved the development of two frameworks: an Android framework that makes the incorporation of Android devices easier and a server-based framework that provides the server side for the development of the referred applications. A use case that uses these two frameworks has been developed. Finally, all technology developed is available throw a public Git repository.},
keywords = {},
pubstate = {published},
tppubtype = {article}
}
In the current world, it is easy to listen that everybody and everything is connected. Over this connected world, the concept of location-based services has grown in order to provide digital services in everyplace and at every time. Nevertheless, this is not 100% true because the connection is not guaranteed for many people and in many places. These are the Degraded Communications Environments (DCE), environments where the availability of high-speed communications is not guaranteed in at least the 75% of the time. This paper works over the experience of a previous work in developing light protocols that do not need broadband for communication. This work provides an extension of these protocols for the inclusion of mobile devices as elements of the communication process and a set of libraries to allow the development of applications in DCE. The work done has involved the development of two frameworks: an Android framework that makes the incorporation of Android devices easier and a server-based framework that provides the server side for the development of the referred applications. A use case that uses these two frameworks has been developed. Finally, all technology developed is available throw a public Git repository.
Gorrachategui, Iván Sanz; Ruiz, Carlos Bernal; Bono, Antonio; Pajovic, Milutin; Ruata, Gabriel Martínez
Gaussian Process Regression Applied to VRLA Battery Voltage Prediction in Photovoltaic Off-Grid Systems Journal Article
In: Jornada de Jóvenes Investigadores del I3A, vol. 6, 2018.
@article{gorrachategui2018gaussian,
title = {Gaussian Process Regression Applied to VRLA Battery Voltage Prediction in Photovoltaic Off-Grid Systems},
author = {Iván Sanz Gorrachategui and Carlos Bernal Ruiz and Antonio Bono and Milutin Pajovic and Gabriel Martínez Ruata},
doi = {10.26754/jji-i3a.201802826},
year = {2018},
date = {2018-01-01},
journal = {Jornada de Jóvenes Investigadores del I3A},
volume = {6},
abstract = {This study addresses the use of GPR techniques for VRLA battery voltage prediction purposes in PV off-grid systems. The goal is to know whether the system is able to endure a predictable power consumption pattern without running out of energy. Two approaches are considered: sample-based prediction and pattern-based forecasting.},
keywords = {},
pubstate = {published},
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This study addresses the use of GPR techniques for VRLA battery voltage prediction purposes in PV off-grid systems. The goal is to know whether the system is able to endure a predictable power consumption pattern without running out of energy. Two approaches are considered: sample-based prediction and pattern-based forecasting.
Proceedings Articles
Blanco, Teresa; Casas, Roberto; Pérez, José María López
Common Understanding Area (CUA): An x-disciplinary design tool for technological innovation Proceedings Article
In: 2018 XIII Technologies Applied to Electronics Teaching Conference (TAEE), pp. 1-8, 2018.
@inproceedings{8476102,
title = {Common Understanding Area (CUA): An x-disciplinary design tool for technological innovation},
author = {Teresa Blanco and Roberto Casas and José María López Pérez},
doi = {10.1109/TAEE.2018.8476102},
year = {2018},
date = {2018-06-01},
booktitle = {2018 XIII Technologies Applied to Electronics Teaching Conference (TAEE)},
pages = {1-8},
abstract = {In the process of innovation of a technological product, the involvement of the disciplines is as necessary as the technological literacy of the team members. In fact, it is well known that the communication problems related to the lack of technological literacy hinder disruptive innovation. A methodological tool, Common Understanding Area (CUA) is presented, which is useful in the teaching field; as an individual instrument of learning; as an electronic product design guide; as a resource to structure the information; as a tool for communication and decision making; as a means of defining product specifications; and as a guide for the evaluation of concepts. Based on a long-term assessment with students of different degrees in engineering, the improved methodological tool is presented, now also transferred and validated in the professional field.},
keywords = {},
pubstate = {published},
tppubtype = {inproceedings}
}
In the process of innovation of a technological product, the involvement of the disciplines is as necessary as the technological literacy of the team members. In fact, it is well known that the communication problems related to the lack of technological literacy hinder disruptive innovation. A methodological tool, Common Understanding Area (CUA) is presented, which is useful in the teaching field; as an individual instrument of learning; as an electronic product design guide; as a resource to structure the information; as a tool for communication and decision making; as a means of defining product specifications; and as a guide for the evaluation of concepts. Based on a long-term assessment with students of different degrees in engineering, the improved methodological tool is presented, now also transferred and validated in the professional field.
Sánchez, Carlos Medrano; Bono, Antonio; Catalán, Raúl Igual; Brío, Bonifacio Martín; García, Inmaculada Plaza
Adaptación de las prácticas de la asignatura de Instrumentación Electrónica a la modalidad semipresencial Proceedings Article
In: Tecnología, Aprendizaje y Enseñanza de la Electrónica: Actas del XIII Congreso de Tecnología, Aprendizaje y Enseñanza de la Electrónica, Tenerife, 20-22 de junio, 2018, pp. 548–555, Universidad de La Laguna 2018.
@inproceedings{sanchez2018adaptacion,
title = {Adaptación de las prácticas de la asignatura de Instrumentación Electrónica a la modalidad semipresencial},
author = {Carlos Medrano Sánchez and Antonio Bono and Raúl Igual Catalán and Bonifacio Martín Brío and Inmaculada Plaza García},
year = {2018},
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booktitle = {Tecnología, Aprendizaje y Enseñanza de la Electrónica: Actas del XIII Congreso de Tecnología, Aprendizaje y Enseñanza de la Electrónica, Tenerife, 20-22 de junio, 2018},
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Piqueras, Carlos Romero; Casas, Roberto; Pérez, Eduardo Manchado; Pérez, José María López; Blanco, Teresa
Proyecto Exprés: Creación de grupos interdisciplinares cohesionados a través de un proyecto parte de asignaturas de distintos grados Proceedings Article
In: Tecnología, Aprendizaje y Enseñanza de la Electrónica: Actas del XIII Congreso de Tecnología, Aprendizaje y Enseñanza de la Electrónica, Tenerife, 20-22 de junio, 2018, pp. 430–437, Universidad de La Laguna 2018.
@inproceedings{piqueras2018proyecto,
title = {Proyecto Exprés: Creación de grupos interdisciplinares cohesionados a través de un proyecto parte de asignaturas de distintos grados},
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year = {2018},
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booktitle = {Tecnología, Aprendizaje y Enseñanza de la Electrónica: Actas del XIII Congreso de Tecnología, Aprendizaje y Enseñanza de la Electrónica, Tenerife, 20-22 de junio, 2018},
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Blanco, Teresa; Casas, Roberto; Pérez, José María López
Common Understanding Area (CUA): Una herramienta de diseño x-disciplinar para la innovación tecnológica Proceedings Article
In: Tecnología, Aprendizaje y Enseñanza de la Electrónica: Actas del XIII Congreso de Tecnología, Aprendizaje y Enseñanza de la Electrónica, Tenerife, 20-22 de junio, 2018, pp. 438–445, Universidad de La Laguna 2018.
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title = {Common Understanding Area (CUA): Una herramienta de diseño x-disciplinar para la innovación tecnológica},
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2017
Journal Articles
Bono, Antonio; Bernal-Ruíz, Carlos; Brío, Bonifacio Martín; Pérez-Cebolla, Francisco J; Martínez-Iturbe, Abelardo
Recipient size estimation for induction heating home appliances based on artificial neural networks Journal Article
In: Neural Computing and Applications, vol. 28, no. 11, pp. 3197–3207, 2017.
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title = {Recipient size estimation for induction heating home appliances based on artificial neural networks},
author = {Antonio Bono and Carlos Bernal-Ruíz and Bonifacio Martín Brío and Francisco J Pérez-Cebolla and Abelardo Martínez-Iturbe},
year = {2017},
date = {2017-01-01},
journal = {Neural Computing and Applications},
volume = {28},
number = {11},
pages = {3197–3207},
publisher = {Springer},
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Marin, Javier; Blanco, Teresa; Marin, Jose J
Octopus: A design methodology for motion capture wearables Journal Article
In: Sensors, vol. 17, no. 8, pp. 1875, 2017.
@article{marin2017octopus,
title = {Octopus: A design methodology for motion capture wearables},
author = {Javier Marin and Teresa Blanco and Jose J Marin},
year = {2017},
date = {2017-01-01},
journal = {Sensors},
volume = {17},
number = {8},
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Blanco, Teresa; López-Forniés, Ignacio; Zarazaga-Soria, Francisco Javier
Deconstructing the Tower of Babel: a design method to improve empathy and teamwork competences of informatics students Journal Article
In: International Journal of Technology and Design Education, vol. 27, no. 2, pp. 307–328, 2017.
@article{blanco2017deconstructing,
title = {Deconstructing the Tower of Babel: a design method to improve empathy and teamwork competences of informatics students},
author = {Teresa Blanco and Ignacio López-Forniés and Francisco Javier Zarazaga-Soria},
year = {2017},
date = {2017-01-01},
journal = {International Journal of Technology and Design Education},
volume = {27},
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Marin, Javier; Blanco, Teresa; Marin, Jose J
Research lines to improve access to health instrumentation design Journal Article
In: Procedia computer science, vol. 113, pp. 641–646, 2017.
@article{marin2017research,
title = {Research lines to improve access to health instrumentation design},
author = {Javier Marin and Teresa Blanco and Jose J Marin},
year = {2017},
date = {2017-01-01},
journal = {Procedia computer science},
volume = {113},
pages = {641–646},
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Blanco, Teresa; Marco, Álvaro; Casas, Roberto; Tamargo, Adriana
Propuesta metodológica para el diagnóstico multidisciplinar de problemas de ingeniería Journal Article
In: DYNA Management, vol. 5, no. 1, pp. 20–p, 2017.
@article{blanco2017propuesta,
title = {Propuesta metodológica para el diagnóstico multidisciplinar de problemas de ingeniería},
author = {Teresa Blanco and Álvaro Marco and Roberto Casas and Adriana Tamargo},
year = {2017},
date = {2017-01-01},
journal = {DYNA Management},
volume = {5},
number = {1},
pages = {20–p},
publisher = {Publicaciones DYNA SL},
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Blanco, Teresa; Casas, Roberto; Manchado-Pérez, Eduardo; Asensio, Ángel; López-Pérez, Jose M
From the islands of knowledge to a shared understanding: interdisciplinarity and technology literacy for innovation in smart electronic product design Journal Article
In: International Journal of Technology and Design Education, vol. 27, no. 2, pp. 329–362, 2017.
@article{blanco2017islands,
title = {From the islands of knowledge to a shared understanding: interdisciplinarity and technology literacy for innovation in smart electronic product design},
author = {Teresa Blanco and Roberto Casas and Eduardo Manchado-Pérez and Ángel Asensio and Jose M López-Pérez},
year = {2017},
date = {2017-01-01},
journal = {International Journal of Technology and Design Education},
volume = {27},
number = {2},
pages = {329–362},
publisher = {Springer},
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Moreno, Carlos Andrés Trasviña; Martín, Rubén Blasco; Marco, Álvaro; Casas, Roberto
Unmanned aerial vehicle based wireless sensor network for marine-coastal environment monitoring Journal Article
In: Jornada de Jóvenes Investigadores del I3A, vol. 5, 2017.
@article{moreno2017unmanned,
title = {Unmanned aerial vehicle based wireless sensor network for marine-coastal environment monitoring},
author = {Carlos Andrés Trasviña Moreno and Rubén Blasco Martín and Álvaro Marco and Roberto Casas},
year = {2017},
date = {2017-01-01},
journal = {Jornada de Jóvenes Investigadores del I3A},
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Trasviña-Moreno, Carlos A; Blasco, Rubén; Marco, Álvaro; Casas, Roberto; Trasviña-Castro, Armando
Unmanned aerial vehicle based wireless sensor network for marine-coastal environment monitoring Journal Article
In: Sensors, vol. 17, no. 3, pp. 460, 2017.
@article{trasvina2017unmanned,
title = {Unmanned aerial vehicle based wireless sensor network for marine-coastal environment monitoring},
author = {Carlos A Trasviña-Moreno and Rubén Blasco and Álvaro Marco and Roberto Casas and Armando Trasviña-Castro},
year = {2017},
date = {2017-01-01},
journal = {Sensors},
volume = {17},
number = {3},
pages = {460},
publisher = {Multidisciplinary Digital Publishing Institute},
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Conferences
Sanz, Iván; Bernal, Carlos; Oyarbide, Estanis
Síntesis general de arquitecturas de bloques para sistemas de almacenamiento de energía híbridos Conference
vol. 5, 2017.
@conference{sanz2017sintesis,
title = {Síntesis general de arquitecturas de bloques para sistemas de almacenamiento de energía híbridos},
author = {Iván Sanz and Carlos Bernal and Estanis Oyarbide},
year = {2017},
date = {2017-01-01},
journal = {Jornada de Jóvenes Investigadores del I3A},
volume = {5},
keywords = {},
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Montijano, Eduardo; Bernal, Carlos; Sagüés, Carlos; Bono, Antonio; Artal, Jesús Sergio; others,
Ventajas docentes de un flotador magnético para la experimentación de técnicas control Conference
Servicio de Publicaciones de la Universidad de Oviedo, 2017.
@conference{montijano2017ventajas,
title = {Ventajas docentes de un flotador magnético para la experimentación de técnicas control},
author = {Eduardo Montijano and Carlos Bernal and Carlos Sagüés and Antonio Bono and Jesús Sergio Artal and others},
year = {2017},
date = {2017-01-01},
journal = {Actas de las XXXVIII Jornadas de Automática},
publisher = {Servicio de Publicaciones de la Universidad de Oviedo},
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Technical Reports
Boné, Javier Marín; Blanco, Teresa; Zurdo, José Javier Marín
Research Lines to Improve Access to Health Instrumentation Design Technical Report
2017.
@techreport{marin2017researchb,
title = {Research Lines to Improve Access to Health Instrumentation Design},
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Pérez, Eduardo Manchado; Pérez, José María López; Piqueras, Carlos Romero; Casas, Roberto
Colaboración con empresas en la docencia de asignaturas en el marco del ABP [Collaboration with companies in the teaching of subjects in the framework of PBL] Technical Report
2017.
@techreport{manchado2017colaboracion,
title = {Colaboración con empresas en la docencia de asignaturas en el marco del ABP [Collaboration with companies in the teaching of subjects in the framework of PBL]},
author = {Eduardo Manchado Pérez and José María López Pérez and Carlos Romero Piqueras and Roberto Casas},
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2016
Journal Articles
Martinez-Iturbe, Abelardo; Perez-Cebolla, Francisco Jose; Brío, Bonifacio Martín; Bernal, Carlos; Bono, Antonio
Energy transformations in a self-excited switched reluctance generator Journal Article
In: Energies, vol. 9, no. 5, pp. 321, 2016.
@article{martinez2016energy,
title = {Energy transformations in a self-excited switched reluctance generator},
author = {Abelardo Martinez-Iturbe and Francisco Jose Perez-Cebolla and Bonifacio Martín Brío and Carlos Bernal and Antonio Bono},
year = {2016},
date = {2016-01-01},
journal = {Energies},
volume = {9},
number = {5},
pages = {321},
publisher = {Multidisciplinary Digital Publishing Institute},
keywords = {},
pubstate = {published},
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Perez-Cebolla, Francisco Jose; Martinez-Iturbe, Abelardo; Brío, Bonifacio Martín; Bernal, Carlos; Bono, Antonio
Nonlinear lumped-circuit model for switched reluctance motors exhibiting core losses Journal Article
In: IEEE Transactions on Industrial Electronics, vol. 63, no. 6, pp. 3433–3445, 2016.
@article{perez2016nonlinear,
title = {Nonlinear lumped-circuit model for switched reluctance motors exhibiting core losses},
author = {Francisco Jose Perez-Cebolla and Abelardo Martinez-Iturbe and Bonifacio Martín Brío and Carlos Bernal and Antonio Bono},
year = {2016},
date = {2016-01-01},
journal = {IEEE Transactions on Industrial Electronics},
volume = {63},
number = {6},
pages = {3433–3445},
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