Emiliano Pérez Hernández

Universidad de Extremadura | UNEX · Department of Electric Engineering, Electronics and Automatics

Serious games are a powerful resource in the teaching-learning process in formal and informal learning settings since this kind of activity motivates participants to take part actively in their own learning process. Within informal learning environments, they serve to improve their pedagogical role, which is sometimes difficult to be perceived by u...

Accessibility regulations towards building design and public places are more restrictive than in past years. Along with energy efficiency, accessibility is one of the pillars of an optimal building design. However, even buildings adapted for actual regulations are not always optimal, and there is still much to do to avoid adding more difficulties f...

Digital twin (DT) technology commonly applied in current Industry 4.0, understood as high-fidelity 3D models of a physical system that are able to mimic the behavior of such a system accurately, is turning into a disruptive trend in the education sector and it is expected that will have a significant influence on future of many degrees, especially...

Increasing students’ motivation and understanding is a classical purpose when trying to innovate in the classroom. Within modern educational systems, digital twins (DTs), understood as digital or virtual replicas of a physical entity that are able to mimic its behavior accurately, are turning into a disruptive trend in the higher education sector t...

Las nubes de puntos cada vez pueden contener más información, parte de la cual puede ser variable en el tiempo. Por este motivo, es valioso poder generar nubes que contengan la información correspondiente a diferentes instantes de tiempo sin la edundancia de información espacial. De esta forma, se consigue que el procesamiento y la visualización de...

Desde sus inicios, el ámbito de la visión por computador se ha esforzado por recabar de imágenes 2D y espacios 3D la información y el conocimiento que el ser humano puede extraer fácilmente con un solo vistazo. Los métodos más efectivos han apostado por llevar el concepto de inteligencia artificial un paso más allá, optando por unir la extracción d...

This paper presents a simulator based on physical modeling of a self-balancing robot to be used for students in courses of Automatic Control in the COVID-19 era, including educational aspects and a guide of use in the classroom. It belongs to an ongoing project to develop new interactive educational resources for education of subjects within System...

This paper describes the design process of an educational escape room (EER) to support teaching of “Industrial Process Control”, a fourth-year optional course within the Bachelor’s Degree in Electronic Engineering and Automation at University of Extremadura (UEx). Details of the type, objectives, narrative, challenges to be solved, required equipme...

When it concerns dissemination, the relationship between cultural heritage and technology has not always been easy. On the one hand, the emotions involved in knowing, enjoying, and feeling a real heritage remain should not be eclipsed by the technological experience. On the other hand, technology cannot be relegated to the point where its use is so...

This paper presents a method to restore 3D models created from range sensors. The approach recovers the 3D information that is lost during the scanning process, usually due to inaccessible zones on the object (occluded areas and crevices). The raw and incomplete 3D data are first projected onto a grid to identify the zones to be repaired. Our algor...

No se concibe el trabajo arqueológico en la actualidad sin la inclusión de nuevas metodologías que faciliten las tareas de investigación y ofrezcan soluciones a problemas que, empleando métodos tradicionales, quedarían sin resolver. Proponemos en este artículo la aplicación de una estrategia de reconstrucción de puzles 3D incompletos sobre una de l...

Unfortunately, it sometimes happens that heritage buildings and structures unearthed during the construction of new infrastructures cannot be adequately conserved once dug out. Before the eternal doubt, keeping or covering them, the economic aspect often takes precedence. Luckily, when the decision is to hide it again, technology offers the possibi...

People with disabilities encounter numerous barriers when dealing with the simplest and most usual things in their daily lives. This is even more remarkable when they are faced with archaeological heritage buildings or environments. People with reduced mobility come too often upon architectural barriers that stop them from enjoying their visits to...

Laboratory experiments offer one way to introduce more realism in education and play a key role for the acquisition of practical skills, especially in engineering. This paper addresses the development of an equipment to teach fundamentals of industrial process control engineering mainly for undergraduate courses at the University of Extremadura. Th...

This paper studies the economic growth of the countries in the Group of Twenty (G20) in the period 1970-2018. It presents dynamic models for the world's most important national economies, including for the first time several economies which are not highly developed. Additional care has been devoted to the number of years needed for an accurate shor...

The traditional approach for physical reproduction in Cultural Heritage requires the production of moulds on the very surface of the original artwork in an invasive, manual and usually time-consuming process that is intensely influenced by the complexity of the piece to be reproduced. The difficulties increase when changing the size of the copy is...

Virtual laboratories have been demonstrated to contribute successfully to the theoretical understanding of many important systems theory and automatic control concepts in engineering education. This paper describes the pilot experience on the use of such laboratories as learning tools in introductory systems theory courses at the University of Extr...

There is ample evidence that supports that interactive learning enhances learning and knowledge retention among students. This paper provides a set of considerations on the use of interactive tools, mainly from the perspective of the teachers (usually, also lab designers), regarding the benefits and weaknesses of these resources in control engineer...

This paper deals with the use of the DELTALAB-COSIMI wastewater treatment (WWT) plant SP244 to support laboratory teaching of industrial process control in engineering degrees at the University of Extremadura. With this equipment, automation technician students can learn in a practical way a variety of fundamentals concepts of process control. A se...

This paper presents models of economic growth for all the countries of the Group of Seven (G7) in the 1973-2016 period. The models consist of differential equations, of both integer and fractional order, where the gross domestic product (GDP) is a function of the country's land area, arable land, population, school attendance, gross capital formati...

Technology development really reaches its highest point when it becomes a tool to facilitate life to people, especially to those more disadvantaged groups. This is the case of people with disabilities, who find lots of barriers to cope with the most usual and simplest things in their day-to-day. This fact is even more significant when they happen t...

t is a fact that studying subjects eminently theoretical as History, Philosophy, etc. may sometimes be boring for teenagers. In our current society, based on the immediacy of data, images, sounds..., telling stories in a traditional way ends up reversing in a counterproductive way for learners and teachers. New educational methodologies have been d...

This paper presents an original method for the analysis of the geometric and optical properties of parabolic solar trough collectors using laser scanners and image processing techniques. The aim of the paper is to propose a methodology with which to automatically analyse geometric errors in the mirror and receiver, in addition to presenting an empi...

Children, from ever younger ages, are exposed to new technologies and accustomed to their usage. One of the uses they enjoy the nost are video games. During game sessions, they are focused on the objectives of the game and have an enthusiastic and active attitude. Conversely, children have a passive attitude, as mere receivers of knowledge, and som...

The current advances of Information and Communication Technologies (ICTs) have created new spaces for the recreational participation, mainly on virtual spaces, which can be considered as one of the main drivers of the cultural and creative production. This paper describes the experience in developing and testing an interactive 3D virtual environmen...

El Modelado con Información para la Construcción (Building Information Modelling o BIM, en inglés) es una metodología de trabajo colaborativa que implica el proceso de generación y gestión de datos de un edificio a lo largo de su ciclo de vida. En los últimos años, estos modelos se han adaptado con éxito a la gestión de información en el ámbito de...

En este trabajo se presenta un procedimiento de segmentación de datos 3D pertenecientes a obras del patrimonio cultural. El objetivo es, en primer lugar, que el algoritmo sea capaz de separar las zonas ornamentales de las no ornamentales y, en segundo lugar, que el procedimiento sea rápido. Para ello se ha propuesto un método que realiza la segment...

Este trabajo trata de la adaptación experimentada por la metodología BIM (Building Information Modelling) para abordar el modelado y la gestión de edificios históricos, obteniendo lo que se conoce como HBIM (Heritage/Historic Building Information Model). Las siete dimensiones y los niveles de madurez establecidos en BIM, se evalúan y analizan para...

This paper presents models of economic growth for all states of the European Union (EU), since either 1970 or the year of accession to the EU. Both integer and fractional order models are obtained, where the gross domestic product (GDP) is a function of the country's land area, gross capital formation (GCF), exports of goods and services, and avera...

In the last decades, the academic community has developed a huge variety of interactive resources to support teaching both in the classroom and in the laboratory, especially in engineering degrees. Among them, the use of virtual and remote laboratories (VRLs), which combine features of traditional laboratories with interactive simulations, is essen...

This paper presents models of economic growth for all the countries of the Group of Seven (G7) in the 1973–2016 period. The models consist of differential equations, of both integer and fractional order, where the gross domestic product (GDP) is a function of the country’s land area, arable land, population, school attendance, gross capital formati...

Laboratory experiences play a critical role in engineering education. For their development, resources like PC-based simulation and didactic equip-ment are commonly used. On the other hand, more and more low-cost and open-source tools, both hardware and software, are being used around In-formation and Communication Technologies (ICTs). Furthermore,...

Both the acquisition of practical skills and experimentation plays a vital role in technology and engineering education. To that purpose, and due to several reasons, one effective and reasonable way to support teaching in the classroom and the laboratory is to use interactive tools. This article summarizes the teaching experience derived by using t...

In the current context of new information and communications technologies (ICTs), many universities are revamping their learning and teaching methods with more refined and effective teaching practices in which students are actively included in the teaching-learning process. This paper discusses on current trends in engineering education to ensure t...

This work presents a fractional order approach to model the growth of national economies, namely, their gross domestic products (GDPs). Land area, arable land, population, school attendance, gross capital formation, exports of goods and services, general government final consumption expenditure and money and quasi money are taken as variables to de...

This paper presents a review of the most relevant current techniques that deal with hole-filling in 3D models. Contrary to earlier reports, which approach mesh repairing in a sparse and global manner, the objective of this review is twofold. First, a specific and comprehensive review of hole-filling techniques (as a relevant part in the field of me...

Este artículo presenta las primeras experiencias de nuestro equipo de investigación en el desarrollo de robots nadadores tipo flagelo helicoidal de pequeñas dimensiones (de unos pocos centímetros) capaces de navegar en un fluido en condiciones de bajo número de Reynolds. Se presentan dos prototipos de robots que difieren entre sí principalmente en...

This paper deals with modelling the growth of national economies, namely, their gross domestic products (GDPs), from the fractional calculus point of view. We focus on the economies of France and Italy. The results show that fractional models have better performance in comparison with classical alternatives proposed in the literature.

Hardware-in-the-loop (HIL) systems are recognized to be effective tools to support teaching in Controls, especially in laboratory courses, rather than only simulations, since a more realistic student experience is achieved with no need of the use of a real equipment. This naturally leads to a better use of the resources for both the students and th...

Recently, teachers and researchers developed a huge variety of resources to support teaching, especially for engineering degrees. This paper describes the development of physical modeling based simulators in the Simulink/Simscape environment as interactive tools to validate regulators in Automatic Control. This type of modeling uses a physical netw...

Recently, teachers and researchers developed a huge variety of resources to support teaching, especially for engineering degrees. This paper describes the development of physical modeling based simulators in the Simulink©/Simscape™ environment as interactive tools to validate regulators in Automatic Control. This type of modeling uses a physical ne...

Hardware-in-the-loop (HIL) systems are recognized to be effective tools to support teaching in Controls, especially in laboratory courses, rather than only simulations, since a more realistic student experience is achieved with no need of the use of a real equipment. This naturally leads to a better use of the resources for both the students and th...

In this work we report the application of Concept Maps and App-based Instant Feedback in an Automation-related course of the Electronics and Automation Engineering degree in the University of Extremadura. This study is considered as first stage of a long-term strategy to revise the teaching procedure traditionally used with these subjects. Such str...

In this paper, vibration suppression of a flexible beam on a moving cart is investigated based on fractional order disturbance observers (FODOB). Linear models to describe the position of the beam-cart system and the single-mode vibration of the beam are firstly derived. Likewise, a fractional order model is also identified for such a vibration, wh...

La asignatura de Robótica se encuentra como materia optativa en las dos titulaciones de primer ciclo de la Escuela Técnica Superior de Ingeniería Informática desde su implantación, y está prevista su impartición en el futuro título de grado de la Escuela. Desde su implantación se ha venido impartiendo por el mismo equipo docente. En base a esta exp...

En este artículo se propone un método para rellenar huecos en objetos 3D. La idea principal es la de utilizar un algoritmo de restauración de imágenes para reconstruir las partes que se han de completar. Para ello es necesario hacer una transformación de los datos de la superficie 3D en datos de imagen 2D. Por tanto, el algoritmo propuesto parte de...

This work analyzes a new method for object recognition in complex scenes combining vision-based techniques applied to the 3-D data obtained using range sensors and object identification coming from radio frequency tags (radio frequency identification (RFID) technology). Three-dimensional vision-based algorithms for object recognition have many rest...

In this paper we present the 3D restitution of large and incomplete thousand-year-old sculptures belonging to the Spanish Museum of Roman Art (MNAR, Museo Nacional de Arte Romano). Roman sculptures are difficult to synthesize because of the complex geometry of the clothes that the characters usually wear and the glows that the marble causes. Theref...

In this work a method for filling holes in 3D meshes based on a 2D image restoration algorithm is expounded. Since 3D data must be converted to a suitable input format, a 3D to 2D transformation is executed by projecting the 3D surface onto a grid. The storage of the depth information in every grid provides the 2D image which the restoration algori...

Nowadays virtual reality users and professionals demand a growing quality and a higher degree of realism in development and applications. Among these technologies augmented reality systems stand out due to their complexity and possibilities, having open current problems from the digitalization process to the accurate insertion of digital informatio...

This work describes a method for filling holes in a 3D mesh based on 2D image restoration algorithms. Since these algorithms need an image as input, the first stage of the method concerns a 3D to 2D transformation. By pro- jecting the 3D surface onto a squared plane, a 2D image is generated in such a way that the depth information is stored in each...

This work presents a new method for object recognition in complex scenes combining vision-based techniques applied to the 3D data obtained using range sensors, and object identification coming from Radio Frequency tags (RFID technology). Vision based algorithms for 3D recognition have many restrictions in practical applications: uncertainty, incapa...

En este trabajo se muestra un método para el reconocimiento de objetos de forma libre a partir de los datos de rango de una vista parcial. Para ello presentamos una nueva característica que denominamos Cono-Curvatura Ponderada (WCC), que mide el ángulo que sustenta cada uno de los nodos de la malla. Debido a que la información empleada no es comple...