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Mr. José Varela-Aldás
Universidad Tecnológica Indoamérica

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0 control system
0 robotic
0 Computer and information sciences
0 Sensor Applications
0 Augmented and Virtual Reality

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Conference paper
Published: 03 July 2021 in Algorithms and Data Structures
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Cooperative control of mobile robots allows to transport heavy loads collaboratively between 2 or more robots, these applications have motivated the development of new control strategies to coordinate multiple robots automatically. On the other hand, energy optimization in robotic systems is increasingly important to ensure autonomy and take care of resources. This article introduces an application for cooperative control of 3 mobile robots in open loop, the goal is to coordinate the position and parameters of the triangular shape created from the distances between robots. The control algorithm is designed using the Pontryagin principle, starting from the training model and solving differential equations with numerical methods. Mobile robots are built using 3D printing technology and free hardware with wireless Bluetooth communication to receive orders from the remote station. The application is implemented on a computer by inserting the developed algorithm and generating the control orders, this program is developed in Matlab through a main menu for user management. The results present the simulation and experimentation of the system, highlighting the positions and velocities generated by cooperative control with energy optimization, as well as the images of the movements made by the robots according to the orders sent. Finally, a usability score for the app that demonstrates high acceptance is obtained.

ACS Style

José Varela-Aldás; Christian Ichina; Belén Ruales; Víctor H. Andaluz. Application for the Cooperative Control of Mobile Robots with Energy Optimization. Algorithms and Data Structures 2021, 329 -340.

AMA Style

José Varela-Aldás, Christian Ichina, Belén Ruales, Víctor H. Andaluz. Application for the Cooperative Control of Mobile Robots with Energy Optimization. Algorithms and Data Structures. 2021; ():329-340.

Chicago/Turabian Style

José Varela-Aldás; Christian Ichina; Belén Ruales; Víctor H. Andaluz. 2021. "Application for the Cooperative Control of Mobile Robots with Energy Optimization." Algorithms and Data Structures , no. : 329-340.

Conference paper
Published: 03 July 2021 in Algorithms and Data Structures
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Since cancellation of face-to-face education during the health emergency caused by COVID-19, higher education institutions, have had to guarantee the right to education through virtualization. Therefore, this work analyzes the teaching-learning process adapted to the virtual mode in the students of technical subjects of the professionalizing axis in the industrial engineering career a private university of Ecuador. Quantitative research is performed for this using surveys, performance index collection, and historical data. The method has a comparative scope between two academic periods, contrasting the data before and after the pandemic, the indicators are taken from students and teachers. The analysis of surveys is carried out in 3 components of teaching, in students are obtained: planning and methodology, with 81.1% considered as satisfied; teacher-assisted activities, with 79.1% content with the activities; and in practical activities, with 74.9% according to the tools used. Comparisons of indicators in different academic periods show minimal variations in performance, teachers improve the average performance score by 4.1%, and students drop academic performance by 2.6%. Finally, the correlation demonstrates a similar perception between students and teacher in the learning practice component.

ACS Style

Fernando Saá; Lorena Caceres; Esteban M. Fuentes; José Varela-Aldás. Teaching-Learning in the Industrial Engineering Career in Times of COVID-19. Algorithms and Data Structures 2021, 517 -530.

AMA Style

Fernando Saá, Lorena Caceres, Esteban M. Fuentes, José Varela-Aldás. Teaching-Learning in the Industrial Engineering Career in Times of COVID-19. Algorithms and Data Structures. 2021; ():517-530.

Chicago/Turabian Style

Fernando Saá; Lorena Caceres; Esteban M. Fuentes; José Varela-Aldás. 2021. "Teaching-Learning in the Industrial Engineering Career in Times of COVID-19." Algorithms and Data Structures , no. : 517-530.

Journal article
Published: 18 June 2021 in Sustainability
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In the face of the COVID-19 pandemic, the World Health Organization (WHO) declared the use of a face mask as a mandatory biosafety measure. This has caused problems in current facial recognition systems, motivating the development of this research. This manuscript describes the development of a system for recognizing people, even when they are using a face mask, from photographs. A classification model based on the MobileNetV2 architecture and the OpenCv’s face detector is used. Thus, using these stages, it can be identified where the face is and it can be determined whether or not it is wearing a face mask. The FaceNet model is used as a feature extractor and a feedforward multilayer perceptron to perform facial recognition. For training the facial recognition models, a set of observations made up of 13,359 images is generated; 52.9% images with a face mask and 47.1% images without a face mask. The experimental results show that there is an accuracy of 99.65% in determining whether a person is wearing a mask or not. An accuracy of 99.52% is achieved in the facial recognition of 10 people with masks, while for facial recognition without masks, an accuracy of 99.96% is obtained.

ACS Style

Jonathan Talahua; Jorge Buele; P. Calvopiña; José Varela-Aldás. Facial Recognition System for People with and without Face Mask in Times of the COVID-19 Pandemic. Sustainability 2021, 13, 6900 .

AMA Style

Jonathan Talahua, Jorge Buele, P. Calvopiña, José Varela-Aldás. Facial Recognition System for People with and without Face Mask in Times of the COVID-19 Pandemic. Sustainability. 2021; 13 (12):6900.

Chicago/Turabian Style

Jonathan Talahua; Jorge Buele; P. Calvopiña; José Varela-Aldás. 2021. "Facial Recognition System for People with and without Face Mask in Times of the COVID-19 Pandemic." Sustainability 13, no. 12: 6900.

Journal article
Published: 15 April 2021 in Energies
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At present, electrical network stability is of the utmost importance because of the increase in electric demand and the integration of distributed generation deriving from renewable energy. In this paper, we proposed a static reactive power compensator model with common direct current voltage sources. Converter parameters were calculated and designed to fulfill specifications. In order to ascertain the device response for different operating modes as reactive power consumer and generator, we developed the model’s power and control circuits in Matlab Simulink. Simulations were performed for different conditions, and as a result, the current and voltage waveforms and the circular power chart were obtained. This paper has theoretically proven it is possible to achieve the consumption or generation of purely active or reactive power by implementing a static reactive power compensator with common DC voltage sources.

ACS Style

Manuel Ayala-Chauvin; Bahodurjon Kavrakov; Jorge Buele; José Varela-Aldás. Static Reactive Power Compensator Design, Based on Three-Phase Voltage Converter. Energies 2021, 14, 2198 .

AMA Style

Manuel Ayala-Chauvin, Bahodurjon Kavrakov, Jorge Buele, José Varela-Aldás. Static Reactive Power Compensator Design, Based on Three-Phase Voltage Converter. Energies. 2021; 14 (8):2198.

Chicago/Turabian Style

Manuel Ayala-Chauvin; Bahodurjon Kavrakov; Jorge Buele; José Varela-Aldás. 2021. "Static Reactive Power Compensator Design, Based on Three-Phase Voltage Converter." Energies 14, no. 8: 2198.

Conference paper
Published: 01 April 2021 in Communications in Computer and Information Science
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Tensile tests make it possible to determine the resistance and other relevant parameters of the materials. These procedures are usually performed with equipment that is expensive and inaccessible to higher education centers with limited budgets. In the case of acquiring this hardware, the disadvantage is that this are purely manual machines that make the use and learning process difficult. That is why this document shows the construction of a machine that allows this type of testing, but using low-cost materials. The mechanical and electronic design and programming that has been used to implement and semi-automate the machine is briefly but clearly described. To validate the functionality, the respective tests have been carried out, although it is a limited version that requires improvements, the results are satisfactory. The curve obtained when carrying out tests with A36 steel has shown a similarity with the theory. Thus, students obtain a technological tool that contributes to academic training, strengthening knowledge in the study of materials.

ACS Style

José Varela-Aldás; Jorge Buele; Juan Cruz. Construction of a Low-Cost Semi-automatic Machine for Tensile Testing. Communications in Computer and Information Science 2021, 225 -235.

AMA Style

José Varela-Aldás, Jorge Buele, Juan Cruz. Construction of a Low-Cost Semi-automatic Machine for Tensile Testing. Communications in Computer and Information Science. 2021; ():225-235.

Chicago/Turabian Style

José Varela-Aldás; Jorge Buele; Juan Cruz. 2021. "Construction of a Low-Cost Semi-automatic Machine for Tensile Testing." Communications in Computer and Information Science , no. : 225-235.

Conference paper
Published: 01 April 2021 in Communications in Computer and Information Science
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Georeferenced tools have made it possible to use the information collected through e-collaboration environments in a better way. Nevertheless, no study has been found on quantifying the influence of software tools over the capacity of interpreting data of victims of some kind of felony. This paper aims to validate the technology acceptance of applications georeferencing crimes using a prototype that could be useful for certain institutions to generate public policies. A web prototype is implemented to georeference data provided by felony acts victims. The application’s prototype was validated by a group of 122 college students using the Technology Acceptance Model. The results were interpreted with the help of Kendall Tau-b correlation analysis where highly significant positive correlation values were obtained.

ACS Style

Franklin Castillo; Hernán Naranjo-Ávalos; Jorge Buele; José Varela-Aldás; Yesenia D. Amaguaña; Franklin W. Salazar. Interpreting Felony Acts Using Georeferenced Data. Case Study in Ambato, Ecuador. Communications in Computer and Information Science 2021, 44 -54.

AMA Style

Franklin Castillo, Hernán Naranjo-Ávalos, Jorge Buele, José Varela-Aldás, Yesenia D. Amaguaña, Franklin W. Salazar. Interpreting Felony Acts Using Georeferenced Data. Case Study in Ambato, Ecuador. Communications in Computer and Information Science. 2021; ():44-54.

Chicago/Turabian Style

Franklin Castillo; Hernán Naranjo-Ávalos; Jorge Buele; José Varela-Aldás; Yesenia D. Amaguaña; Franklin W. Salazar. 2021. "Interpreting Felony Acts Using Georeferenced Data. Case Study in Ambato, Ecuador." Communications in Computer and Information Science , no. : 44-54.

Conference paper
Published: 25 March 2021 in Lecture Notes in Electrical Engineering
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At the end of 2019, a highly contagious virus appears, changing the form of interaction between humans, this has implied the use of technology as a support tool to counteract the effects of the new disease (COVID-19). Although many technologies have been successfully adapted, applied robotics promises to reduce or even eliminate the need for person-to-person contact. This article presents the control of the body temperature of the clients of a commercial premises through the implementation of a system that includes a robotic arm, two sensors and a mobile device. The robotic arm is constructed using 3D printing and a low-cost electronic circuitry, body temperature is obtained using an infrared sensor, and a mobile device displays, alerts, and stores the information. The developed code allows remote control of the robot positions or a pre-programmed sequence is automatically activated that includes temperature measurement and hand disinfection. The results show the robot in operation and the data acquired by the system, observing adequate temperatures in most of the users and a single alert during the tests carried out. The conclusions establish the importance of the system in the real application and highlight the multiple benefits of this proposal.

ACS Style

José Varela-Aldás; Andrés Moreira; Paul Criollo; Belén Ruales. Body Temperature Control Using a Robotic Arm. Lecture Notes in Electrical Engineering 2021, 762, 280 -293.

AMA Style

José Varela-Aldás, Andrés Moreira, Paul Criollo, Belén Ruales. Body Temperature Control Using a Robotic Arm. Lecture Notes in Electrical Engineering. 2021; 762 ():280-293.

Chicago/Turabian Style

José Varela-Aldás; Andrés Moreira; Paul Criollo; Belén Ruales. 2021. "Body Temperature Control Using a Robotic Arm." Lecture Notes in Electrical Engineering 762, no. : 280-293.

Journal article
Published: 18 February 2021 in Sustainability
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The COVID-19 pandemic has changed people’s lives and the way in which certain services are provided. Such changes are not uncommon in healthcare services and they will have to adapt to the new situation by increasing the number of services remotely offered. Limited mobility has resulted in interruption of treatments that traditionally have been administered through face-to-face modalities, especially those related to cognitive impairments. In this telerehabilitation approach, both the patient and the specialist physician enter a virtual reality (VR) environment where they can interact in real time through avatars. A spaced retrieval (SR) task is implemented in the system to analyze cognitive performance. An experimental group (n = 20) performed the SR task in telerehabilitation mode, whereas a control group (n = 20) performed the SR task through a traditional face-to-face mode. The obtained results showed that it is possible to carry out cognitive rehabilitation processes through a telerehabilitation modality in conjunction with VR. The cost-effectiveness of the system will also contribute to making healthcare systems more efficient, overcoming both geographical and temporal limitations.

ACS Style

José Varela-Aldás; Jorge Buele; Pedro Ramos Lorente; Iván García-Magariño; Guillermo Palacios-Navarro. A Virtual Reality-Based Cognitive TeleRehabilitation System for Use in the COVID-19 Pandemic. Sustainability 2021, 13, 2183 .

AMA Style

José Varela-Aldás, Jorge Buele, Pedro Ramos Lorente, Iván García-Magariño, Guillermo Palacios-Navarro. A Virtual Reality-Based Cognitive TeleRehabilitation System for Use in the COVID-19 Pandemic. Sustainability. 2021; 13 (4):2183.

Chicago/Turabian Style

José Varela-Aldás; Jorge Buele; Pedro Ramos Lorente; Iván García-Magariño; Guillermo Palacios-Navarro. 2021. "A Virtual Reality-Based Cognitive TeleRehabilitation System for Use in the COVID-19 Pandemic." Sustainability 13, no. 4: 2183.

Conference paper
Published: 31 January 2021 in Advances in Intelligent Systems and Computing
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In the past, home automation in residential environments was a luxury, but today it has become a human need. Although costs have decreased, there are households that do not have sufficient infrastructure for this type of technology. For this reason, this document describes the implementation of a low-cost intelligent system that makes it easy to control the facilities of a department. The actions are coordinated using the Amazon’s Alexa digital voice assistant, included in the Echo Dot smart device. In the hardware part, conventional household elements are used, coupled to an accessible electronic system whose central processing unit is the ESP8266 embedded card. The link between the stations is made using a free server that works as a bridge to transfer the information. The tests carried out validate this proposal and with it, an initial prototype is presented that can be installed in low-income housing and educational institutions.

ACS Style

José Varela-Aldás; Jorge Buele; Myriam Cumbajin. Smart Home Control System Using Echo Dot. Advances in Intelligent Systems and Computing 2021, 303 -312.

AMA Style

José Varela-Aldás, Jorge Buele, Myriam Cumbajin. Smart Home Control System Using Echo Dot. Advances in Intelligent Systems and Computing. 2021; ():303-312.

Chicago/Turabian Style

José Varela-Aldás; Jorge Buele; Myriam Cumbajin. 2021. "Smart Home Control System Using Echo Dot." Advances in Intelligent Systems and Computing , no. : 303-312.

Conference paper
Published: 29 January 2021 in Advances in Intelligent Systems and Computing
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Memory loss is a problem that affects the majority of older adults worldwide. Making an early diagnosis allows specialist doctors to carry out rehabilitation programs as a preventive measure against cognitive problems. This has motivated the development of the present application for the diagnosis of memory, based on the already existing Face-Name Associative Memory Exam (FNAME). The test counts the number of correct answers when matching the face with the corresponding name, using the associative memory. In this way, a process that is previously carried out manually is automated, prioritizing having a more accurate measurement of the response times of the participants. In addition, a self-test is presented that allows having a second criterion on the user's diagnosis. Both tests are presented in an interactive interface that has been designed using MATLAB software, using the uicontrol tool. The experimental tests carried out corroborate the correct operation of this proposal, the results of which show scores and response times.

ACS Style

José Varela-Aldás; Jorge Buele; Doris Pérez; Guillermo Palacios-Navarro. Memory Diagnostic Application Using the FNAME. Advances in Intelligent Systems and Computing 2021, 41 -50.

AMA Style

José Varela-Aldás, Jorge Buele, Doris Pérez, Guillermo Palacios-Navarro. Memory Diagnostic Application Using the FNAME. Advances in Intelligent Systems and Computing. 2021; ():41-50.

Chicago/Turabian Style

José Varela-Aldás; Jorge Buele; Doris Pérez; Guillermo Palacios-Navarro. 2021. "Memory Diagnostic Application Using the FNAME." Advances in Intelligent Systems and Computing , no. : 41-50.

Conference paper
Published: 29 January 2021 in Advances in Intelligent Systems and Computing
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SARS-CoV-2 is a new virus that has put most of the world on alert, unleashing a health crisis that requires taking security measures to stop the spread of the pandemic. Among the main measures is the continuous use of hand disinfectant, for this reason it is important to develop mechanisms to speed up this process without exposing someone's health. This paper presents a SCARA (Selective Compliant Articulated Robot Arm) to apply hand disinfectant gel through pre-programmed positions that are activated with the presence of the user. The robot has been designed in a 3D environment for subsequent fabrication and installation using Arduino technology. Additionally, a mobile application is developed that allows to visualize the sensor data and remotely control the desired positions. The system is evaluated at the front door of a real commercial establishment, applying a usability test to the attendees. The results present the robot in operation and the usability test data, obtaining satisfactory results of the implemented prototype.

ACS Style

José Varela-Aldás; Jefferson Pilla; Edwin Llugsha; Orlando Cholota. Application of Hand Disinfectant Gel Using a SCARA. Advances in Intelligent Systems and Computing 2021, 13 -23.

AMA Style

José Varela-Aldás, Jefferson Pilla, Edwin Llugsha, Orlando Cholota. Application of Hand Disinfectant Gel Using a SCARA. Advances in Intelligent Systems and Computing. 2021; ():13-23.

Chicago/Turabian Style

José Varela-Aldás; Jefferson Pilla; Edwin Llugsha; Orlando Cholota. 2021. "Application of Hand Disinfectant Gel Using a SCARA." Advances in Intelligent Systems and Computing , no. : 13-23.

Journal article
Published: 17 November 2020 in Sensors
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Virtual Reality (VR) has had significant advances in rehabilitation, due to the gamification of cognitive activities that facilitate treatment. On the other hand, Immersive Virtual Reality (IVR) produces outstanding results due to the interactive features with the user. This work introduces a VR application for memory rehabilitation by walking through a maze and using the Oculus Go head-mounted display (HMD) technology. The mechanics of the game require memorizing geometric shapes while the player progresses in two modes, autonomous or manual, with two levels of difficulty depending on the number of elements to remember. The application is developed in the Unity 3D video game engine considering the optimization of computational resources to improve the performance in the processing and maintaining adequate benefits for the user, while the generated data is stored and sent to a remote server. The maze task was assessed with 29 subjects in a controlled environment. The obtained results show a significant correlation between participants’ response accuracy in both the maze task and a face–pair test. Thus, the proposed task is able to perform memory assessments.

ACS Style

José Varela-Aldás; Guillermo Palacios-Navarro; Rebecca Amariglio; Iván García-Magariño. Head-Mounted Display-Based Application for Cognitive Training. Sensors 2020, 20, 6552 .

AMA Style

José Varela-Aldás, Guillermo Palacios-Navarro, Rebecca Amariglio, Iván García-Magariño. Head-Mounted Display-Based Application for Cognitive Training. Sensors. 2020; 20 (22):6552.

Chicago/Turabian Style

José Varela-Aldás; Guillermo Palacios-Navarro; Rebecca Amariglio; Iván García-Magariño. 2020. "Head-Mounted Display-Based Application for Cognitive Training." Sensors 20, no. 22: 6552.

Conference paper
Published: 11 November 2020 in Communications in Computer and Information Science
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Access to electricity supply in remote areas is limited, despite having wealth of other natural resources such as water. This document presents the design and construction of a scale electric generation system, taking advantage of the hydraulic energy produced by a constant flow of water flow. For this, the turbine design is described, which is based on the principles of Francis and Kaplan. In addition, the structural design made in CAD/CAM software and the actual implementation of the system are shown. To determine the generated electric potential, the electromagnetic analysis is performed based on the Maxwell-Faraday equation and the respective calculations. The validation of this proposal is determined by conducting experimental tests with balanced, unbalanced, series and parallel coils and with their implementation in a home.

ACS Style

Bryan Guáitara; Jorge Buele; Franklin W. Salazar; José Varela-Aldás. Prototype of a Low Cost Turbine for the Generation of Clean Energy in the Ecuadorian Amazon. Communications in Computer and Information Science 2020, 564 -571.

AMA Style

Bryan Guáitara, Jorge Buele, Franklin W. Salazar, José Varela-Aldás. Prototype of a Low Cost Turbine for the Generation of Clean Energy in the Ecuadorian Amazon. Communications in Computer and Information Science. 2020; ():564-571.

Chicago/Turabian Style

Bryan Guáitara; Jorge Buele; Franklin W. Salazar; José Varela-Aldás. 2020. "Prototype of a Low Cost Turbine for the Generation of Clean Energy in the Ecuadorian Amazon." Communications in Computer and Information Science , no. : 564-571.

Conference paper
Published: 30 September 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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Interior architecture is part of the individual, social and business life of the human being; it allows structuring the spaces to inhabit, study or work. This document presents the design and implementation of a system that allows the three-dimensional reconstruction of objects with a reduced economic investment. The image acquisition process and treatment of the information with mathematical support that it entails are described. The system involves an MS Kinect as a tool to create a radar that operates with the structured light principle to capture objects at a distance of less than 2 meters. The development of the scripts is done in the MATLAB software and in the same way the graphical interface that is presented to the user. As part of the initial tests of this prototype, the digitization of geometric shape structures has been performed with an accuracy of over 98%. This validates its efficient operation, which serves as the basis for the development of modeling in interior architecture for future work.

ACS Style

Jorge Buele; José Varela-Aldás; Esteban X. Castellanos; Janio Jadán-Guerrero; Jeneffer Barberán. 3D Object Reconstruction Using Concatenated Matrices with MS Kinect: A Contribution to Interiors Architecture. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 12254, 682 -697.

AMA Style

Jorge Buele, José Varela-Aldás, Esteban X. Castellanos, Janio Jadán-Guerrero, Jeneffer Barberán. 3D Object Reconstruction Using Concatenated Matrices with MS Kinect: A Contribution to Interiors Architecture. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; 12254 ():682-697.

Chicago/Turabian Style

Jorge Buele; José Varela-Aldás; Esteban X. Castellanos; Janio Jadán-Guerrero; Jeneffer Barberán. 2020. "3D Object Reconstruction Using Concatenated Matrices with MS Kinect: A Contribution to Interiors Architecture." Transactions on Petri Nets and Other Models of Concurrency XV 12254, no. : 682-697.

Conference paper
Published: 30 September 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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Urban traffic complications in most underdeveloped countries and congestion in all metropolitan areas has become a daily problem with a difficult solution. Disorganized mobility of drivers and pedestrians along with the increase in travel time, non-compliance with schedules, air pollution and intolerable sound levels, have harmful effects on human health. Therefore, this research describes a geolocation system of urban transport through a mobile application developed on the Xamarin platform. Drivers send the latitude and longitude points when starting a route, this data will be sent to the SQL SERVER online database server, using the SmarterASP.NET platform. By developing the geolocation system in ASP.NET, the coordinates are available to users in an interval of 5 s. The developed interface shows a location map, where the route in real time is presented. It also shows the administration of users, drivers, buses, assignment of routes, assignment of buses and registration of static routes. Being a prototype system, the university transport system has been taken as an object of study to corroborate its correct operation with the respective experimental tests. Satisfaction surveys have also been carried out on a group of 300 people, among students and university teachers and their validation is carried out through the Technological Acceptance Model (TAM). To interpret the results, Kendall Tau-b correlation analysis was used, obtaining positive correlation values with a high significance value.

ACS Style

Franklin W. Salazar; Hernán Naranjo-Ávalos; Jorge Buele; Marco J. Pintag; Édgar R. Buenaño; Cristina Reinoso; Pilar Urrutia-Urrutia; José Varela-Aldás. Prototype System of Geolocation Educational Public Transport Through Google Maps API. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 12254, 367 -382.

AMA Style

Franklin W. Salazar, Hernán Naranjo-Ávalos, Jorge Buele, Marco J. Pintag, Édgar R. Buenaño, Cristina Reinoso, Pilar Urrutia-Urrutia, José Varela-Aldás. Prototype System of Geolocation Educational Public Transport Through Google Maps API. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; 12254 ():367-382.

Chicago/Turabian Style

Franklin W. Salazar; Hernán Naranjo-Ávalos; Jorge Buele; Marco J. Pintag; Édgar R. Buenaño; Cristina Reinoso; Pilar Urrutia-Urrutia; José Varela-Aldás. 2020. "Prototype System of Geolocation Educational Public Transport Through Google Maps API." Transactions on Petri Nets and Other Models of Concurrency XV 12254, no. : 367-382.

Conference paper
Published: 30 September 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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Solar ultraviolet (UV) radiation has increased in recent years due to ozone layer depletion and in Ecuador in particular, due to its geographical position and the height of its cities. Prolonged sun exposures in childhood increase the risk of causing malignant effects on the skin and eyes, such as squamous cell carcinoma, melanoma and cataracts. For this reason, this document describes the design of a device based on UV optical sensors that allows determining the existing radiation index. As a processing unit there is the Raspberry Pi 3B+ embedded board and to display the data physically there are LED panels. The storage of information is done through a database managed by MySQL and also implemented on the board. The levels of the ultraviolet radiation index (UVI) are presented through a graphical user interface (GUI) in real time, which also allows generating a report in a .csv file. Functional tests were carried out in the central courtyard of two educational units, to raise awareness among parents and authorities on the adoption of preventive measures that avoid possible damage to the skin of children when carrying out outdoor activities.

ACS Style

Jorge Buele; Francisco I. Chango; María De Los Ángeles Chango; Marlon Santamaría; José Varela-Aldás. System for Monitoring and Warning of the Ultraviolet Radiation Index: A Study Case in Ecuador Elementary Schools. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 12254, 846 -861.

AMA Style

Jorge Buele, Francisco I. Chango, María De Los Ángeles Chango, Marlon Santamaría, José Varela-Aldás. System for Monitoring and Warning of the Ultraviolet Radiation Index: A Study Case in Ecuador Elementary Schools. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; 12254 ():846-861.

Chicago/Turabian Style

Jorge Buele; Francisco I. Chango; María De Los Ángeles Chango; Marlon Santamaría; José Varela-Aldás. 2020. "System for Monitoring and Warning of the Ultraviolet Radiation Index: A Study Case in Ecuador Elementary Schools." Transactions on Petri Nets and Other Models of Concurrency XV 12254, no. : 846-861.

Conference paper
Published: 10 July 2020 in Communications in Computer and Information Science
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An immersive virtual reality application was developed as a serious game to support children on their decisions about food, the system was composed by the Gear VR (Viewer and controller), and a phone which contains the mobile application developed in Unity, providing the immersive environment, the platform was based on a path where the player has to go through it choosing between different sort of meals and also between different physical activities, the effect of balanced diet plus adequate physical activity seems reflected on the avatar previously chosen by the user, the app was tested on 12 children between 8 and 10 years old during one week, children participated on the study after receiving an informed consent, analyzing the tendencies of food choice on children before and after, a notorious positive effect could be seen on the users according to the avatar analyzed at the end of the round, besides a System usability ore was also applied to evaluate the degree of usability of the app, reaching a ore of 88.33% which rates the app as very usable, this results were even better than what was planned at the beginning of the experience.

ACS Style

Esteban M. Fuentes; José Varela-Aldás; Guillermo Palacios-Navarro; Iván García-Magariño. Immersive Virtual Reality App to Promote Healthy Eating in Children. Communications in Computer and Information Science 2020, 9 -15.

AMA Style

Esteban M. Fuentes, José Varela-Aldás, Guillermo Palacios-Navarro, Iván García-Magariño. Immersive Virtual Reality App to Promote Healthy Eating in Children. Communications in Computer and Information Science. 2020; ():9-15.

Chicago/Turabian Style

Esteban M. Fuentes; José Varela-Aldás; Guillermo Palacios-Navarro; Iván García-Magariño. 2020. "Immersive Virtual Reality App to Promote Healthy Eating in Children." Communications in Computer and Information Science , no. : 9-15.

Conference paper
Published: 10 July 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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The STEM (Science-Technology-Engineering-Mathematics) competences have taken the classroom of new generations, due to the need to instill interest in technical sciences and promote the careers of the future. In underdeveloped countries, free access to technology is limited by the scarcity of economic resources, for this it is required low-cost tools that facilitate better multidisciplinary learning. This work presents the implementation of an educational mobile robot to teach STEM competencies; the physical structure has been designed using 3D modeling and printing in PLA. The electronic system presented in this work is based on the Arduino embedded card that connects distance, weight, temperature and color sensors, two DC motors, and an LCD screen. In addition, the mobile robot has Bluetooth communication to connect it to external devices. The interaction with the user (student) is done through a mobile application and an HMI that is displayed on a personal computer. The robot’s features allow the measurement of physical variables, conversion of magnitudes, analysis of the operation of sensors and actuators, and the use of control interfaces. Experimental performance tests are carried out by individuals with an average age of 12 years (K-12), who are subjected to a learning test before and after applying this proposal. Finally, usability tests are carried out on teachers to validate the system developed.

ACS Style

José Varela-Aldás; Jorge Buele; Janio Jadan-Guerrero; Víctor H. Andaluz. Teaching STEM Competencies Through an Educational Mobile Robot. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 560 -573.

AMA Style

José Varela-Aldás, Jorge Buele, Janio Jadan-Guerrero, Víctor H. Andaluz. Teaching STEM Competencies Through an Educational Mobile Robot. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; ():560-573.

Chicago/Turabian Style

José Varela-Aldás; Jorge Buele; Janio Jadan-Guerrero; Víctor H. Andaluz. 2020. "Teaching STEM Competencies Through an Educational Mobile Robot." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 560-573.

Conference paper
Published: 10 July 2020 in Transactions on Petri Nets and Other Models of Concurrency XV
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Currently, there is a growing public interest in improving the quality of life of people with disabilities, being the visual limitation one of them, where different research projects have been developed. Assistance robotics is a branch dedicated to the support in mobility and rehabilitation of people with visual disabilities and other limitations. This work describes the construction and use of a robotic cane to assist people with visual problems. The robot structure is generated by 3D printing, and the electronic system has been designed based on Arduino technology. The robot features include a sensor distance to detect possible collisions, a GPS to track its movements, and two DC motors in caterpillar-like configuration for cane mobility. In addition, the robot has connectivity with mobile devices through Bluetooth communication, where the mobile application coordinates the movements of the robot in two ways, manual and autonomous, allowing to reach the desired location and sending the user’s location to the web. This proposal is tested in a structured environment so that patients cast their perspective through a usability test and their characteristics are examined through the analysis of an expert.

ACS Style

José Varela-Aldás; John Guamán; Belén Paredes; Fernando A. Chicaiza. Robotic Cane for the Visually Impaired. Transactions on Petri Nets and Other Models of Concurrency XV 2020, 506 -517.

AMA Style

José Varela-Aldás, John Guamán, Belén Paredes, Fernando A. Chicaiza. Robotic Cane for the Visually Impaired. Transactions on Petri Nets and Other Models of Concurrency XV. 2020; ():506-517.

Chicago/Turabian Style

José Varela-Aldás; John Guamán; Belén Paredes; Fernando A. Chicaiza. 2020. "Robotic Cane for the Visually Impaired." Transactions on Petri Nets and Other Models of Concurrency XV , no. : 506-517.

Journal article
Published: 01 May 2020 in CienciAmérica
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La impresión 3D es actualmente una tecnología en auge y una herramienta de utilidad en la lucha contra el COVID-19, debido a que permite construir equipos de protección individual a bajo costo. Este trabajo presenta la implementación de visores de protección facial usando impresión 3D y materiales accesibles, para esto se realiza el diseño 3D de la estructura de soporte y se describen los componentes requeridos para construir los visores de protección. Los resultados detallan los recursos utilizados y los tiempos de producción para entregar los visores a los beneficiarios. Se concluye conveniente usar impresión 3D en la fabricación de equipos de protección personal y los visores entregados evitan el contacto directo con pacientes o posibles portadores del virus.

ACS Style

José Luis Varela-Aldás. Impresión 3D y COVID-19. CienciAmérica 2020, 9, 51 -57.

AMA Style

José Luis Varela-Aldás. Impresión 3D y COVID-19. CienciAmérica. 2020; 9 (2):51-57.

Chicago/Turabian Style

José Luis Varela-Aldás. 2020. "Impresión 3D y COVID-19." CienciAmérica 9, no. 2: 51-57.