Varela Aldas, José

Preferred name

Varela Aldas, José

Main Affiliation

Centro de investigación en Mecatrónica y Sistemas Interactivos

Ambato

josevarela@uti.edu.ec

ORCID

0000-0002-4084-1424

Scopus Author ID

57192546163

Now showing 1 - 10 of 153

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From Simulation to Reality: A Digital Twin Implementation of a 4-DOF Robotic Manipulator
(2025)
Bryan S. Guevara
;
Varela Aldas, José
;
Viviana Moya
;
Angéelica Veróonica Quito Carrióon
;
Marcelo Ortiz
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From Simulation to Reality: A Digital Twin Implementation of a 4-DOF Robotic Manipulator
(2025)
Bryan S. Guevara
;
Varela Aldas, José
;
Viviana Moya
;
Angéelica Veróonica Quito Carrióon
;
Marcelo Ortiz
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From Simulation to Reality: A Digital Twin Implementation of a 4-DOF Robotic Manipulator
(2025)
Bryan S. Guevara
;
Varela Aldas, José
;
Viviana Moya
;
Angéelica Veróonica Quito Carrióon
;
Marcelo Ortiz
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From Simulation to Reality: A Digital Twin Implementation of a 4-DOF Robotic Manipulator
(2025)
Bryan S. Guevara
;
Varela Aldas, José
;
Viviana Moya
;
Angéelica Veróonica Quito Carrióon
;
Marcelo Ortiz
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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.
18
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Analysis of Urban Transport User Satisfaction in Ambato: Segmented Results from a Target Population
(2025)
Junta, Christian
;
William Avila-Armijos
;
Núñez-Naranjo, Aracelly Fernanda
;
Varela Aldas, José
;
Fernando Vladimir Junta
Urban public transportation plays a crucial role in the daily mobility of citizens, especially in medium-sized cities like Ambato, Ecuador. This study aims to evaluate user satisfaction levels with different urban transport cooperatives through a data-driven approach. A total of 123 responses were collected via a digitally distributed survey using QR codes, with a methodological focus on individuals aged 20 to 40 due to their higher digital literacy. The questionnaire included dimensions such as comfort and safety, risk perception, and punctuality. The analysis, conducted through Power BI, revealed differentiated levels of satisfaction across service dimensions. Comfort and safety received a mean rating of 41.5%, while risk perception reached 53.8%. Punctuality, evaluated through a single item, showed a favorable perception from 66.7% of users. These findings indicate specific areas of concern, such as perceptions of security and cleanliness, which require attention from transport providers and local authorities. The results provide a scalable model for user satisfaction assessment that can be replicated in other urban contexts. Moreover, the integration of business intelligence tools facilitates evidencebased decision-making and supports future initiatives to enhance urban mobility systems in Ecuador and Latin America. © 2025 IEEE.
13
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Temperature control system with hysteresis for drying oven using IoT
(2023)
Bucay-Valdiviezo J.
;
Veronica-Ocana Parra S.
;
Saa F.
;
Varela Aldas, José
The fourth industrial revolution (Industry 4.0) spread to the whole world, improving all kinds of industrial processes. Thus, temperature control and monitoring of ovens through the Internet of Things (IoT) is part of this technology, especially in the automotive industry. In this work, the temperature control with hysteresis of a drying oven is carried out incorporating the IoT, with the objective of maintaining the temperature within a certain range in the drying process inside an oven. For this, a thermocouple, heat lamps, couplers and an electronic board are used. The temperature data from the drying oven is sent to the internet via WiFi using a router. The oven temperature data is recorded in the cloud for its respective subsequent analysis using the ThingSpeak services. For the results, the temperature is configured in the range of 50 ° C to 70 ° C that is monitored through a mobile application developed in App Inventor. The tests carried out demonstrate the proper functioning of the system and the high usability of the application. © 2023 IEEE.
29
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Voltammetric Electronic Tongues Applied to Classify Sucrose Samples Through Multivariate Analysis
(2021)
Fuentes, E.M.
;
Varela Aldas, José
;
Verdú S.
;
Meló R.G.
;
Alcañiz M.
The aim of the present study was to classify samples of sugar with different concentrations through a Voltammetric Electronic tongues (VET), with a generic pulse sequence consisted of 22 pulses ranging from –1000 mV to + 1000 mV with a duration of 20 ms/pulse over different samples such as 1.25mM, 2.5mM, 5mM and 10mM, of sucrose concentration, these were measured 4 times each concentration and the test was developed 4 times, giving a total number of 506.880 data supervised learning algorithm using support vector machine was employed, choosing a linear function as a classifying element. In the training, 75% of the data was used to determine the coefficients of the classification function, and the remaining (25%) was used to evaluate the performance of the proposal. The results showed a concordance of more than 80% in the separation of sample, allowing to conclude as acceptable the performance of the classifier and the data acquired through the voltammetric tongue. © 2021, The Author(s), under exclusive license to Springer Nature Switzerland AG.
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Estimation of Unmodeled Dynamics: Nonlinear MPC and Adaptive Control Law With Momentum Observer Dynamic
(2024)
Bryan S. Guevara
;
Luis F. Recalde
;
Viviana Moya
;
Varela Aldas, José
;
Daniel C. Gandolfo
This article proposes an enhancement to estimate unmodeled dynamics within the simplified dynamic model of a quadcopter by integrating three key methodologies: Nonlinear Model Predictive Control (NMPC), a Momentum Observer Dynamics (MOD), and an adaptive control law. Termed as Adaptive NMPC with MOD, this integrated approach leverages NMPC, implemented using the CasADi framework, for real-time decision-making, while the momentum observer facilitates system state estimation and uncertainty mitigation. Simultaneously, the adaptive control law adjusts parameters to estimate errors in unmodeled dynamics. Through digital twin and Model in Loop (MiL) simulations, the effectiveness of this framework is demonstrated. Specifically, the study focuses on the simplified quadcopter model, acknowledging often overlooked inherent dynamics resulting from the simplification by not considering the nonlinearities induced by the drone's attitude angles. Addressing these unmodeled dynamics is critical, and the Adaptive NMPC with MOD method emerges as a robust solution, showcasing its potential across various scenarios.
17
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Evaluating a User Interface for M-Commerce Shoe Sales
(2024)
Castillo Ledesma, Franklin Adrian
;
Varela Aldas, José
;
José Oleas-Orozco
;
Jonathan Toapanta
Interface engineering maximizes user experience by defining the form, function, and interfaces utility. Current interfaces have not optimized user-system interaction. This study aimed to develop a compatible and user-friendly interface to improve user efficiency. Android Studio was used to create a simple and functional interface. The commands combination was designed to prioritize simplicity, reducing user stress. Continuous evaluations support to identify areas for improvement and optimize the interface's performance. The results exposed the application developed was well-received, providing a simple and effective interface. Users reported better interaction and superior satisfaction with the system, confirming the proposed design effectiveness. The user interface developed, currently maximizes the experience, with a user rating of 75% indicating that design is simple and functional. Continuous evaluation and improvement guarantee that application will evolve to fulfill more complex future needs, contributing to user well-being and efficiency.
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Varela Aldas, José

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