Eduardo Francisco Caicedo Bravo

• Ingeniero Electricista, Doctor en Informática Industrial, Ph.D.
• Professor (Full) at University of Valle

Drought is a climatic phenomenon that has increased in severity over time. This study analyzed drought spread in the Alto Patía basin (13,047 km 2) in South America, applying the Standardized Precipitation Index (SPI), Vegetation Health Index (VHI), and Streamflow Drought Index (SDI) to assess meteorological, agricultural, and hydrological drought,...

Drought is a climatic phenomenon that has increased in severity over time. This study analyzed drought spread in the Alto Patía basin (13,047 km2) in South America, applying the Standardized Precipitation Index (SPI), Vegetation Health Index (VHI), and Streamflow Drought Index (SDI) to assess meteorological, agricultural, and hydrological drought,...

The challenges of today’s energy landscape, marked by the search for sustainable development, the expansion of coverage, and the diversification of the energy matrix, allow for electricity systems focusing on renewable energy resources. Microgrids are considered an efficient paradigm for managing distributed renewable energy generation and providin...

Diabetic Retinopathy (DR) is a disease that affect the retina, consequence of a diabetes complication. An accurate an on time diagnosis could delay severe damage in the eye or vision loss. Currently, the diagnosis is supported by a retinography and visual evaluation by a trained clinician. However, retinography evaluation is a difficult task due to...

At present, the energy landscape of many countries faces transformational challenges driven by sustainable development objectives, supported by the implementation of clean technologies, such as renewable energy sources, to meet the flexibility and diversification needs of the traditional energy mix. However, integrating these technologies requires...

The growing interest in deploying photovoltaic systems and achieving their benefits as sustainable energy supplier raises the need to seek reliable medium-term and long-term operations with optimal performance and efficient use of economic resources. Cleaning scheduling is one of the activities that can positively impact performance. This work prop...

This research introduces an algorithm that automatically detects five primary emotions in individuals with Down syndrome: happiness, anger, sadness, surprise, and neutrality. The study was conducted in a specialized institution dedicated to caring for individuals with Down syndrome, which allowed for collecting samples in uncontrolled environments...

This work presents a distributed in-line strategy to manage an isolated microgrid by optimizing active and reactive power dispatch. The proposed objective function leads to minimize the operation costs and addresses some technical requirements such as diminishing power losses and voltage deviation. Additionally, the strategy deals with temporal mul...

The Covid-19 pandemic changed the course of activities, both work and education in the world, migrating to the requirement of virtual platforms and videoconferencing tools, such as Zoom, Google Meet, Jitsi Meet, among others. This generated a globalized and digital culture of learning, activities in congresses, and even business meetings using vide...

This article presents a study based on evaluating different techniques to automatically recognize the basic emotions of people with Down syndrome, such as anger, happiness, sadness, surprise, and neutrality, as well as the statistical analysis of the Facial Action Coding System, determine the symmetry of the Action Units present in each emotion, id...

In view of the challenging task of the operation of microgrids, this work presents a distributed strategy to manage an isolated system by the optimal dispatch of active and reactive power. The ADMM (alternating directions method of multipliers) is adapted to solve two optimization problems, finding power profiles along the day for generators and st...

This paper deals with the optimal sizing of islanded microgrids (MGs), which use diesel generators to supply energy in off-grid areas. The MG under study integrates photovoltaic (PV) and diesel generation, a battery energy storage System (BESS), and an inverter for the connection between AC and DC voltage buses. Levelised cost of energy (LCOE) and...

The smart grid involves a set of interconnected ecosystems applications (electrical, electronic, computer and communications), so the modernization is needed of information, security and infrastructure systems that monitor, control and manage them are increasingly evident. The upgrading smart grid process is a complex interaction between different...

Abstract The knowledge of rainfall regimes is a relevant requirement for many activities such as water resources planning, risk management, agriculture activities management, and other hydrologic applications. The present study has consisted of validating four techniques (one linear, one non-linear, and two hybrids) that allow identifying homogenou...

Diabetic Retinopathy (DR) is a disease on the rise; as this is a complication of diabetes, it becomes an imminent fate in people who have not been treated correctly for the disease, resulting in possible loss of vision if not is detected in time. This disease affects the retina, and the diagnosis is made based on fundus images of patients, through...

Microgrids adoption around all world is increasing with different aims as to integrate renewable generation, providing energy to rural zones, reducing CO2 emissions, or simply as an alternative for energy independence. However, the planning and operation of microgrids can be a challenging task because it involves many economical, technical, environ...

This paper proposes the development of a mobile application for anemia detection using YOLO v5. The app aims to support healthcare professionals in identifying anemia in children in places where mobile signals are missing (isolated). We used an image dataset obtained from Universidad Peruana Cayetano Heredia, which contains pictures of children und...

Autonomous vehicles are considered a viable technological option to implement first/last mile transportation in the cities of tomorrow with a high population density, and for this reason it is essential that they have a robust localization system for the routes first-mile transport and last-mile transport points, and the route’s planning and naviga...

The Energy Management System (EMS) is a strong need for achieving cost-effective, reliable, and pollution-free operation of microgrids operating in isolated areas. Commonly, the EMS approaches use optimization and rolling-horizon predictions. However, the inclusion of very short-term predictions increases the complexity of the optimization, comprom...

Context: This work presents different models based on artificial neural networks, among them NNARX, for estimating global solar radiation from UV index measurements. The objective is to determine the efficiency of the models studied to estimate global solar radiation in terms of the coefficient of determination (R²), the root-mean-square error (RMS...

The Advanced Metering Infrastructure (AMI) data represent a source of information in real time not only about electricity consumption but also as an indicator of other social, demographic, and economic dynamics within a city. This paper presents a Data Analytics/Big Data framework applied to AMI data as a tool to leverage the potential of this data...

This work presents the design and construction of a recreational platform named KERO, which is oriented to the development of non-verbal communication skills in children with autism spectrum disorder (ASD) levels 1 and 2, between ages of 4 and 7 years old. The development of a friendly-looking robot with head and upper limbs movement is presented,...

This paper presents the implementation of nonlinear canonical correlation analysis (NLCCA) approach to detect steady-state visual evoked potentials (SSVEP) quickly. The need for the fast recognition of proper stimulus to help end an SSVEP task in a BCI system is justified due to the flickering external stimulus exposure that causes users to start t...

To improve the financial sustainability and business management of composting facilities, mostly small-scale and manually operated facilities, the simultaneous optimization of the process and quality of the final product must be prioritized. This study used artificial neural networks (ANNs) and particle swarm optimization (PSO) as tools to evaluate...

The most popular paradigm in BCIs is the steady-state visually evoked potential (SSVEP) due to their advantages, such as the high information transfer rate (ITR), the time spent on users in the training phase, and the capacity to discriminate each stimulus. One of the most influential factors in the ITR evaluation is the feature extraction methods...

The pandemic caused by COVID 19 has led to the transition from traditional education to other modalities that use technological resources as their primary tool. This work proposes a robotic theater as a reinforcement mechanism in education and transmission of knowledge in various areas for regular education in children. The robotic platform is made...

Technological advancement in recent years has allowed effective development in various fields, the link between technology and education is undoubtedly one of them. The health emergency that has arisen in recent months worldwide is a call for innovation to continue with learning processes that adapt to new study modalities. That is why this work pr...

This article presents an analysis based on Action Units of the facial expressions of four basic emotions in people with Down Syndrome, such as: happiness, sadness, anger and surprise, taking as a reference the Facial Action Coding System, proposed by Paul Ekman, which is based on the universal study of the movements of the muscles of the face, used...

Vision is the principal source of information of the surrounding world. It facilitates our movement and development of everyday activities. In this sense, blind people have great difficulty for moving, especially in unknown environments, which reduces their autonomy and puts them at risk of suffering an accident. Electronic Travel Aids (ETAs) have...

El estado de la infraestructura vial impacta el entorno social, económico y político de una nación. La evaluación de la condición superficial del pavimento es esencial para planificar intervenciones oportunas y eficaces. Las acciones oportunas evitan sobrecostos de operación, impiden el deterioro no controlado y disminuyen los inconvenientes operac...

Recent advances in remote sensing have shown great potential for different kinds of applications such as vegetation and crop supervision. Using hyperspectral image processing, this process can be used to assess large areas of land, allowing for a fast and non-invasive analysis of variables such as water stress, diseases, and type of crops. In this...

Improving the accuracy of rainfall forecasting is relevant for adequate water resources planning and management. This research project evaluated the performance of the combination of three Artificial Neural Networks (ANN) approaches in the forecasting of the monthly rainfall anomalies for Southwestern Colombia. For this purpose, we applied the Non-...

Intersections or junctions are critical points in transportation systems due to their dynamic behaviour, making them prone to safety or efficiency problems. For this reason, the use of technology in monitoring intersections has increased over the last years. In addition, different proposals based on the Internet of Things (IoT) have been used to ha...

Communication is one of the most basic needs that a human being shows throughout his life, since it promotes his integral development and facilitates the interaction with his environment. However, some individuals may not make full use of this ability because of a disease, disorder or accident, with Cerebral Palsy being one of the most common cause...

Planning and operation of smart energetic projects have increased in complexity and requires a deeper analysis. The inclusion of renewable energy and distributed generation sources lead to an inherent difficulty to define appropriate models for decision-making. Nowadays, decisions in planning and operation are made level by level due to a disarticu...

A novel approach to optimize the composting process of biowaste (BW) mixed with sugarcane ilter cake (SFC) and the product quality was attempted in the present study by adopting Artiicial Neuronal Network (ANN) and the particle swarm optimization (PSO) algorithm. The efectiveness of the co-composting process depends on operational parameters such a...

Planning and operation of Smart energetic have become more complex to analyse due to structural changes in the energy sector. The inclusion of distributed generation sources, generation with renewable sources, storage systems, and the dislocation of information between the different organization levels and actors lead to the inherent difficulty of...

We present a monocular system that uses shape priors for improving the quality of estimated depth maps, specially in the region of an object of interest, when the environment presents complex conditions like changes in light, with low-textured, very reflective and translucent objects. A depth map is built by solving a non-convex optimization proble...

Hyperspectral images are multidimensional massive sets of information that have shown a great potential for different kind of applications as urban mapping, environmental management, vegetation and crops supervision and mineral detection. However, due to its high dimensional nature and the high variability of the spectral information, the dimension...

Nowadays, 21% of Colombian population, and the 35% of the population in Cauca Valley have limited movement of body, arms, hands or legs. Then, the quality of life of these people is highly affected, since they have limitations in daily living activities. Physical rehabilitation therapies allow the restoration of movement and maximum functional capa...

Given that the analysis of past monthly rainfall variability is highly relevant for the adequate management of water resources, the relationship between the climate-oceanographic indices, and the variability of monthly rainfall in Southwestern Colombia at different time scales was chosen as the research topic. It should also be noted that little-to...

In recent years, there has been a transformation in the value chain of different industrial sectors, like the electricity networks, with the appearance of smart grids. Currently, the underlying knowledge in raw data coming from numerous devices can mark a significant competitive advantage for utilities. It is the case of the Advanced Metering Infra...

The planning and operation of Smart Grid projects is an issue that has increased in complexity and requires further analysis. This is due to the increase of distributed generation sources, generation with renewable sources, storage systems, and a disarticulation of information between the different levels in the sector and the stakeholders. All the...

The proposed early detection algorithm is justified because the probability of success to control a criminal activity increas-es when the response time for generating a warning alarm is reduced. In this paper, a video-based representation model to describe suspicious behavior from elementary actions is proposed. Such behaviors allow detecting poten...

We present a system that improves the quality of noisy and incomplete depth maps captured with inexpensive range sensors. We use a model-based approach that measures the discrepancy between a model hypothesis and observed depth data. We represent the model hypothesis as a 3D level-setembedding function and the observed data as a point cloud coming...

We present a system that improves the quality of noisy and incomplete depth maps captured with inexpensive range sensors. We use a model-based approach that measures the discrepancy between a model hypothesis and observed depth data. We represent the model hypothesis as a 3D level-setembedding function and the observed data as a point cloud coming...

El trabajo propuesto presenta el levantamiento y análisis de cuatro emociones de personas con Síndrome de Down (SD), disgusto, felicidad, tristeza y sorpresa, en función de sus expresiones faciales, tomando como referencia el Sistema de Código de Unidades Faciales, planteado por Paul Ekman, el cual se basa en el estudio universal de los movimientos...

En este trabajo se presenta el proceso de diseño e implementación de aplicaciones para apoyar procesos terapéuticos para personas con discapacidad. Se utilizó el enfoque de diseño centrado en el usuario para definir los requisitos de las aplicaciones e identificar el contexto terapéutico. De igual forma, se presenta una validación preliminar del us...

La hipoterapia implica riesgos y dificultades para realizar una valoración cuantitativa en la interacción humano animal durante una sesión de terapia. Para ello, se ofrece a los pacientes con necesidades especiales una opción de tratamiento para minimizar los riesgos y poder cuantificar la evolución durante el tratamiento. El abordaje dado, utiliza...

Oceanic-atmospheric phenomena of different time scales concurrently might affect the streamflow in several basins around the world. The Atrato River Basin (ARB) and Patía River Basin (PRB) of the Colombian Pacific region are examples of such basins. Nevertheless, the relations between the streamflows in the ARB and PRB and the oceanic-atmospheric f...

Food requirements in the world have increased, evidencing the necessity to improve standard techniques of agricultural production. To do so, one option is through technological elements like hyperspectral remote sensing of vegetation and crops. Remote sensing and hyperspectral imagery are not invasive methods. They allow covering large land space i...

Recent advances in remote sensing have shown great potential for different kind of applications like vegetation and crop supervision. Using hyperspectral images (HSI), this process can be performed over large areas of land, allowing for a fast and non-invasive analysis of variables such as water stress, diseases, type of crops, among many others. I...

1. Resumen El trabajo propuesto presenta el levantamiento y análisis de cuatro emociones de personas con Síndrome de Down (SD), disgusto, felicidad, tristeza y sorpresa, en función de sus expresiones faciales, tomando como referencia el Sistema de Código de Unidades Faciales, planteado por Paul Ekman, el cual se basa en el estudio universal de los...

In energy management systems in microgrids, the combined and on-line use of optimisation and prediction rolling horizons of renewable power and demand may compromise the optimal performance. Usually, the medium-term optimal behaviour improves with additional available convergence time, while the error in predictions worsens with a broader horizon,...

The success of many projects linked to the management and planning of water resources depends mainly on the quality of the climatic and hydrological data that is provided. Nevertheless, the missing data are frequently found in hydroclimatic variables due to measuring instrument failures, observation recording errors, meteorological extremes, and th...

One of the main incentives for implementing video-based surveillance systems is the urban security. During the last years, several approaches for automatic detection of suspicious events have been proposed. Those methods usually require a training stage before starting their operation. This means that previous to run time a representative dataset o...

Children with physical disabilities are at high risk of developing adverse effects on their cognitive development, due to their lack of ability to interact with the world around them. Multiple studies have demonstrated the potential of robots as tools used to assist playful activities, which allow the learning of cognitive, social, motor and langua...

Background: Children with cerebral palsy have difficulty to sit, stand, walk, run and jump independently. Therapy is an important factor in improving these aspects, and if applied in early intervention treatments, when the child is growing, it could have many benefits. These therapies require intensive and extended sessions, which in turn demand de...

Los robots proporcionan nuevas formas de terapia para pacientes con desórdenes neurológicos. Las terapias de marcha asistidas con exoesqueletos pueden incrementar la duración y la intensidad de los entrenamientos para los pacientes y reducir el esfuerzo físico del terapeuta. Sin embargo, el uso de estos dispositivos para el entrenamiento de la marc...

En este artículo se presenta un sistema portátil para el monitoreo ambulatorio del ritmo cardiaco y la detección temprana de las arritmias cardiacas de mayor riesgo. El sistema consta de un sensor con tres electrodos superficiales para la captura de la señal ECG, la cual se transmite vía Bluetooth a un dispositivo móvil con Android, en donde se rea...

Resumen Los niños que presentan discapacidad física corren un alto riesgo de desarrollar efectos adversos en su desarrollo cognitivo, debido a su incapacidad de interactuar con el medio. Múltiples estudios han demostrado el potencial de los robots como herramientas usadas para asistir actividades lúdicas, dado que, permiten el aprendizaje de habili...

Background: An adaptive Brain–Computer Interface (aBCI) is an extension of a traditional Brain–Computer Interface (BCI). In this work, trial rejection, median filter and software agent are included in a BCI to modify the parameters of its classifier and smoothen the signal feature during task execution. Methods: In this study, a database was used w...

This work describes the development of a nonfatigating Brain–Computer Interface (BCI) based on Steady State Evoked Potentials (SSVEP) and Event-Related Desynchronization (ERD) to control an autonomous car. Through a graphical interface presented to the user in the autonomous car, destination places are shown. The selection of commands is performed...

p>Este trabajo presenta una propuesta de asistencia para las terapias de rehabilitación de niños con lesión del miembro superior, basada en el desarrollo de un ambiente lúdico de asistencia tecnológica, cuyo objetivo es contribuir al aumento del beneficio de las terapias, en cuanto a la motivación y avance en el componente de rehabilitación físico....

We present a system for dense tracking, 3D reconstruction, and object detection of desktop-like environments, using a depth camera; the Kinect sensor. The camera is moved by hand meanwhile its pose is estimated, and a dense model, with evolving color information of the scene, is constructed. Alternatively, the user can couple the object detection m...

Experiencias y desarrollos realizados en Infraestructura de Medición Avanzada en el Grupo de Investigación Percepción y Sistemas Inteligentes de la Universidad del Vale

This project presents a proposal to assist the therapies for the children's rehabilitation with upper limb injury, based on the development of a playful environment for technological assistance, with the goal of improving patient participation and motivation, to benefit and advance the rehabilitation patient's therapies with upper limb disability....

In this article a proposal for the integration of decentralized generation architectures in microgrids environments, which includes the contribution of renewable energy sources for both the National Interconnected System and Non-Interconnected Areas is presented. Some aspects on the Colombian Electrical System are considered, the potential of renew...

En este artículo se presenta una propuesta de integración de arquitecturas de generación descentralizada en ambientes de micro-redes que incluye el aporte de fuentes de energía renovable, tanto para zonas del Sistema Interconectado Nacional, como para Zonas No Interconectadas. Se consideran algunos aspectos del Sistema Eléctrico Colombiano, el pote...

For children with Cerebral Palsy, occupational and physical therapy are intervention mechanisms that support their development in areas of motor, cognitive, sensory, communicative, social and emotional functioning. Moreover, with recent advances in robotics, protocols using robots are ideal to make an impact in these interventions. The proposal of...

En este documento se propone una aproximación al entendimiento del lenguaje neuromotor de una persona con una amputación por encima de rodilla, mediante la identificación de su intención de movimiento a partir de la percepción de las manifestaciones tanto internas como externas de los Patrones de Acción Fija (PAF) mediante el uso de una propiocepci...

La metodología de clustering fue utilizada para agrupar tres barrios en Quibdó teniendo en cuenta factores que favorecen el desarrollo de la malaria. Los mapas auto-organizados de Kohonen fueron utilizados para el análisis de las características más significativas en la clasificación. Los clusters detectados fueron comparados con la clasificación g...

Nowadays, 21% of Colombian population, and the 35% of the population in Cauca Valley have limited movement of body, arms, hands or legs. Then, the quality of life of these people is highly affected, since they have limitations in daily living activities of. Physical rehabilitation therapies allow the restoration of movement and maximum functional c...

The non-technical energy losses reduction strategies have stimulated the development of centralized metering systems (cms) in Latin America. Furthermore to include ami systems basic functions, the cms embed the measurement of multiple users in a cabinet. To avoid the utility customers getting access to the energy meter, each cabinet is mounted on t...

Nowadays, the use of technological tools has been extended to several fields, broaching health topics like rehabilitation and care of people with special needs. However, in Colombia for the particular case of children with cerebral palsy, the technological tools that they have are few due principally to their cost. In the treatment of the children...

Upper limb injuries cause a profound impact on patient’s quality of life. It is well known that for the recovery of the patient, should be allowed to play an active role in their rehabilitation process. For this reason, new technologies such as robotics, are being implemented to address this problem; as presented by the multiple investigations repo...

Microgrids are a revolutionary concept to face some problems of the big and centralized power systems. Although emerging concept promises to offer numerous benefits, also presents new challenges in control and operation. One of the most important challenges is to make optimal power management into the microgrid. This power management must ensure ma...

We present a low cost localization system that exploits dense image information to continuously track the position of a range camera in 6DOF. This work has two main contributions: First, the localization of the camera is performed with respect to a set of keyframes selected according to a spatial criteria producing a less populated and more uniform...

One of the most used signals in Brain Machine Interfaces (BMI) is the Steady State Visually Evoked Potentials (SSVEP). In a SSVEP-based BMI, a visual stimulus that flickers in a constant frequency is presented to the user, and the system has to detect if the user is gazing the stimulus. Usually the stimulus is a rectangular signal and there are no...

We present a low cost localization system that exploits dense image information to continuously track the position of a range camera in 6DOF. This work has two main contributions: First, the localization of the camera is performed with respect to a set of keyframes selected according to a spatial criteria producing a less populated and more uniform...

Este artículo puede compartirse bajo la licencia CC BY-ND 4.0 (https://creativecommons.org/licenses/by-nd/4.0/) F.A. Zúñiga-Cortés, E.F Caicedo-Bravo y D.M López-Santiago. "Gestión óptima de la potencia eléctrica en una microrred conectada, basada en el algoritmo genético para optimización multiobjetivo MOGA", UIS Ingenierias, vol. 15, no. 2, pp. 1...

Resumen Contexto: Partiendo de las expectativas de evolución del vehículo eléctrico y las estaciones de recarga, se hace necesario estudiar cómo será la interacción entre estos nuevos elementos y la red eléctrica. Con este propósito se realizó una revisión de literatura acerca del impacto de los vehículos eléctricos en las redes de distribución,...

Context: Steady State Visually Evoked Potentials (SSVEP) are brain signals which are one of the most promising signals for Brain Computer Interfaces (BCIs) implementation, however, SSVEP based BCI generally are proven in a controlled environment and there are a few tests in demanding conditions. Method: We present a SSVEP based BCI system that was...

In this paper, we present a low cost localization system that exploits dense image information to continuously track the position of a camera in 6DOF. It leverages of the use of a set of selected "key frames" separated in distance from which a depth map is available to create a local 3D point cloud. In this way, we avoid the computational overload...

In contrast to the wide array of research that uses swarm intelligence to solve optimization problems, a few approaches have recently been taken a feedback control perspective as we do here. To employ a feedback control approach, this paper shows that an algorithmic model of how honeybees forage can be used for control of smart lights. We show that...

Cooperative payload transport´s systems commonly use schemes of coordination and control in order to maintain the formation of the robots involved in the transport task. For this purpose the leader follower algorithm or any of its variations is used. However this kind of systems use, in most cases, control schemes that do not consider in their desi...