Varela Aldas, José
Thumbnail Image
Preferred name
Varela Aldas, José
Main Affiliation
Ambato
Email
josevarela@uti.edu.ec
ORCID
Scopus Author ID
57192546163

Research Output

Filters

23
15 8
Reset filters

Settings
Now showing 1 - 10 of 23
No Thumbnail Available
Publication

Development of a Scale Prototype of Smart Bed Controlled Using a Mobile Application

2022 , Soberon J.C. , Gamboa G. , Castillo F. , Palacios-Navarro G. , Varela Aldas, José

The need for a technological system for health care for sick people is evident. This work develops a scale prototype of a smart bed controlled through a mobile application. The electronic design consists of two servomotors that act to position the bed; these actions can be activated through the mobile application. At the same time, the patient can be monitored by a camera and an infrared thermometer that sends the data to the application through the Internet. The local operating code is designed so that the position of the bed changes automatically according to a preset sequence. The electronic system is based on the ESP32 board; this chip integrates WiFi communication that allows the connection of the bed with the cloud-based in Firebase. Temperature tests were carried out with the help of people to ensure that the data taken was correct. In addition, bed positions and reception of camera images were tested on a mannequin. As a result, adequate communication was obtained between the mobile application and all the devices installed in the smart bed. Finally, an acceptance test is applied that validates this proposal with a good score. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Monitoring Security in a Vehicle Using a Mobile Application

2022 , Miranda M. , Granda K. , Castillo Salazar D.R. , Palacios-Navarro G. , Varela Aldas, José

Today it can still be seen that the lack of technology in old and low-cost vehicles does not allow basic security remote monitoring. For this reason, it is necessary to update its technology, installing electronic systems based on free hardware to perform readings in the vehicles. In addition, mobile devices allow viewing this information remotely using the Internet. In this work, the monitoring of security in a vehicle is carried out using a mobile application. For this, the door state and the vehicle’s internal temperature are read. This electronic system is based on the ESP32 board that has a WiFi communication module to connect to the internet. This is programmed using the Arduino IDE environment. On the other hand, the mobile application installed on a mobile phone is constantly updated and alerts in case of changes. This application is developed in App inventor. A cloud database in Firebase is used to interconnect these two stations, which serves as a container to exchange information. As result, a product acceptance test was applied, obtaining a qualification that validate this proposal. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Control of a Security Door Through the Internet of Things

2022 , Toapanta J. , Miranda M. , Andaluz V.H. , Palacios-Navarro G. , Varela Aldas, José

Home security has increased in recent years with the help of technology. Even more, the appearance of the internet of things (IoT) allows it to control and monitor devices from anywhere in the world. This work develops a proposal that alerts the user about the status of a door through a mobile application using low-cost devices. For the electronic design, a magnetic contact sensor has been used that detects if the door is open. An electric lock is also used to control the door with the mobile application from anywhere in the user. The electronic system is based on an ESP32 board that has WiFi communication, this board sends the door status data to the mobile application. The electric lock can be activated in three ways: manually from the door, automatically according to a programmed routine, and remotely using the mobile app. The platform used for the IoT is Firebase, which allows the exchange of information between the local site and the remote site. The tests carried out around the prototype have responded correctly, the installed sensor continuously reports on the status of the door, and the control is executed according to the orders sent through the cloud. In addition, an acceptance test is used that guarantees the correct operation of the proposal. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Pet Access Control System Using a Mobile Application

2022 , Cuzme C. , Miranda M. , Andaluz V.H. , Palacios-Navarro G. , Varela Aldas, José

This work develops a system consisting of a mobile application and an automatic gate implemented with low-cost technology. The devices are linked to a cloud server through the internet. The design of the system consists of a gate that incorporates a motion sensor to detect the pet, for this a passive infrared sensor is used. The electronic circuit of the gate is based on the ESP32 board. This device sends notifications to monitor when the pet approaches this area. The system consists of two modes, manual and automatic. In manual mode, the user decides to open the gate or not, while in automatic mode the gate opens whenever it detects the pet. On the other hand, the mobile application has been designed to control the operating mode. The application's user interface presents a warning when the presence of the pet is detected and allows the gate to be activated remotely only when it is in manual mode. The cloud platform used is Firebase, this remote database records the latest states of the fields shared by both devices. 3 pets were tested for 1 week to ensure continued system performance. As a result, adequate communication was obtained between the elements installed in the gate and the mobile application. © 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

IoT-Based User Interface for Remote Control of a Mobile Robot

2023 , Varela Aldas, José , Palacios-Navarro G.

Recent advancements in mobile robot research have resulted in the development of precise robot control tools, while information technology research has focused on the Internet of Things (IoT) in the context of the fourth industrial revolution. This study evaluates a user interface designed for remote control of the Crowbot BOLT robot. This robot utilizes the ESP32 board and is controlled through the M5Stack Core2 kit with a touch screen. The user interface offers two modes of operation: touch-based buttons for movement control and gyroscope control based on the M5Stack’s angular position. Communication between the robot and the user interface is established using the MQTT protocol through the ThingSpeak server, allowing control from any location with a line of sight and internet connectivity. Operation data is collected by recording control orders and measuring sending times, while user acceptance is evaluated using an IoT-based technology acceptance model. The results indicate the need for remote control response time improvement and reveal low scores in perceived usefulness and influence social. In conclusion, the study demonstrates the feasibility of remote control of a mobile robot using the MQTT protocol, providing valuable insights for similar applications and considering user recommendations for future enhancements and system expansion. © 2023, The Author(s), under exclusive license to Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Immersive virtual reality app to promote healthy eating in children

2020 , Fuentes E.M. , Varela Aldas, José , Palacios-Navarro G. , García-Magariño I.

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. © Springer Nature Switzerland AG 2020.

View
No Thumbnail Available
Publication

Development of a WBGT Index Meter Based on M5Stack Core2

2022 , Varela Aldas, José , Buele, Jorge , Mosquera H. , Palacios-Navarro G.

Environmental working conditions are of crucial importance for job performance. Thus, thermal comfort helps the human body to withstand long working hours without stress. There are several indicators of heat stress, but one of the most complete is the WBGT (Wet Bulb Globe Temperature) index, which considers 3 temperatures to determine the heat stress index, the dry bulb temperature, the wet-bulb temperature, and the temperature of radiation. For this reason, this document describes the process of building a low-cost heat stress meter. Two DHT22 sensors and M5Stack Core2 controller are used that includes a screen for the presentation of the information. The user interface includes buttons for changing the view type to show indoor or outdoor results, as well as the battery level. In addition, all this information is sent to the IoT platform of ThingSpeak through internet access using WiFi communication, this information can be displayed graphically from a web browser and from anywhere in the world. The data are compared with a commercial meter to validate this prototype, obtaining an error of less than 5% and no significant differences were found. In this way, it is possible to offer equipment for industrial solutions, but at a fraction of its cost. © 2022, Springer Nature Switzerland AG.

View
No Thumbnail Available
Publication

Virtual Reality applications based on activities of daily living (ADL) for cognitive diagnosis and rehabilitation

2022 , Buele, Jorge , Varela Aldas, José , Palacios-Navarro G.

Traditionally, screening tools are available to help diagnose a person's cognitive problem. Therefore, rehabilitation techniques are lab exercises that lack adequate ecological validity. In this paper, we propose to establish the projection of a methodology for the development of serious games based on activities of daily living (ADL). Both for real and immersive environments, to assess what provides better results when applied in healthy patients at first, but with a focus on those suffering from Alzheimer's disease. It is expected that when this research is completed, precedents will be established for the development of new proposals based on virtual environments. © 2022 IEEE.

View
No Thumbnail Available
Publication

Internet of things (IoT)-based assistive system for patients with spinal muscular atrophy (SMA): a case report

2024 , Varela Aldas, José , vila-Armijos W. , Palacios-Navarro G.

Purpose: Assistive technologies based on IoT can contribute to improve quality of living of patients with severe motor difficulties by providing partial or total independence. The aim of this work was to analyse the usability and performance of an assistive system based on the IoT when is evaluated by a child patient with spinal muscular atrophy type 1 (SMA-I). Materials and methods: The study involved a child with SMA-I and his caregiver. The materials used include an M5Stack Core2 kit, a mobile app, and a smart switch based on the ESP-01S card. The patient sends requests to the caregiver from the app installed on the M5Stack Core2 to a mobile app, and controls smart switches located in the rooms. The system was tested by the participants for a period of 30 days to later evaluate its usability and performance. Results: The results show that the control function of smart switches is the most used and there is no decrease in interactions over the days for the system in general. In addition, the scores obtained from both usability tests (patient and caregiver) were 87.5% and 90%, respectively. The average performance of the entire system was 93.33%. Conclusion: The application of assistive technologies based on the IoT allows obtaining a practical solution that improves the development of daily activities in a patient with SMA-I. © 2024 Informa UK Limited, trading as Taylor & Francis Group.

View
No Thumbnail Available
Publication

Effects of immersive virtual reality on the heart rate of athlete’s warm-up

2019 , Varela Aldas, José , Palacios-Navarro G. , García-Magariño I. , Fuentes E.M.

An adequate warm-up prior to intensive exercise can bring benefits to athletes, these requirements may vary depending on the physical activity and the training needs. The immersive virtual reality could have benefits in the warm-up and it can be determined by physiological data of the athlete. This work presents a mobile virtual reality application to stimulate the warm-up of an athlete using a standard treadmill, where the developed application is composed of a pleasant and stimulating environment. A Smartphone and the Gear VR are used as an HMD device, and wireless headphones are placed in the users, in addition, the heart rate of the athletes is monitored using a Polar H7 sensor. Experimental results are obtained in athletes with similar characteristics and conditions, identified a direct relation of the virtual environment with the pulsations per minute (ppm), denoting pulsations greater than usual in case of the stimulating environment and lower pulsations for the pleasant environment. Finally, a usability test is performed that shows the level of sociability of the system. © Springer Nature Switzerland AG 2019.

View