Papers by Luis Eduardo Rodriguez Cheu
Análisis Biomecánico de la Marcha basado en Acelerómetros sobre una Red ZigBee
Springer eBooks, 2013
This paper presents the integration of three-axis accelerometers sensors and the ZigBee networks ... more This paper presents the integration of three-axis accelerometers sensors and the ZigBee networks for assess the gait cycle, in order to monitor a gait at any time and at any-where, it through ambulatory a wearable gait monitoring system for application in a hospital network, or continuous monitoring in a patient’s diary life. The biomechanical analysis proposal of gait was conducted in two stages: (1) Integration of network nodes and the accelerometers sensors, and the private profile design for multiple ZigBee devices over the wireless network and (2) Assembly of the experimental evaluation of normal gait with the ZigBee accelerometers devices over a normal human lower limb. Finally, this work presents the experimental results based on measurements of three-axis accelerations in the ankle, knee and hip with a biomechanical analysis of the stance and swing phase in the normal gait.
Antioquia (Medellín) representa el 27%, Valle del Cauca (Cali) el 13% y los demás departamentos r... more Antioquia (Medellín) representa el 27%, Valle del Cauca (Cali) el 13% y los demás departamentos representan el 30% restante. Los programas de educación superior en Ingeniería Biomédica muestran una uniformidad en cuanto a la duración y a las competencias a desarrollar con ligeras diferencias en los énfasis y los perfiles de egreso. Actualmente existen al menos 528 Ingenieros Biomédicos y Bioingenieros graduados en el país (0,27% del total de las ingenierías). La tasa de graduados por año, entre 2001 y 2007 es en promedio de 75 Ingenieros Biomédicos y Bioingenieros. Se puede concluir que a pesar de la oferta de programas activos de Ingeniería Biomédica a nivel nacional, la tasa de graduados es baja con relación a: la población colombiana que va en aumento, el incremento de personas con discapacidad y adultos mayores y el número de graduados de otras ingenierías. Se propone la reflexión, sobre el reto que imponen los avances científicos y tecnológicos mundiales que de alguna manera se convierten en directrices de formación. Palabras clave-Ingeniería Biomédica, Educación, formación de pregrado.
Towards the definition of a functionality index for the quantitative evaluation of hand-prosthesis
2005 IEEE/RSJ International Conference on Intelligent Robots and Systems, 2005
Abstract Based on the analysis of the parameters considered as more relevant for the evaluation o... more Abstract Based on the analysis of the parameters considered as more relevant for the evaluation of hand performances, a functionality index is proposed. The aim of this study is the definition of a functionality index that provides a quantitative measure of hand ...
Evaluation of Biomechanical Variables and Electromyography for the Mobilization of Patients in the Health Sector Companies in Medellin
IFMBE Proceedings, 2015
ABSTRACT
International Journal of Human Movement and Sports Sciences, 2021
This research aims to find the characteristics of motor control at the level of body stability in... more This research aims to find the characteristics of motor control at the level of body stability in skateboarding athletes from the city of Bogotá through a Romberg test with eyes open and eyes closed. The present study is of a descriptive cross-sectional type and the sample selection for the development of this research was for convenience, for which a direct invitation was performed at different skateboarding clubs in the city and the league skating Bogotá who supports the sport. The sample population corresponds to 30 people with an age between 22.86 +/-7.88 years. Participants developed Romberg test with a duration of 30 s and under the modalities eyes open and closed on a platform of plantar pressure and stabilometry BTS P-Walk. Significant changes were found in comparison of the open and closed eyes tests in the lateral flexion of the spine (LSF) with p=0.018, body center of gravity with p=0.043, left center of gravity with p=0.018, showing improvements in body stability evaluation with eyes closed. It is evident that skateboarding athletes due to the dynamics and sports development on an unstable base present a high level of stability represented in mediolateral and anteroposterior stability and variability radii close to zero, additionally it is observed that work at eye level closed generates a better sports adaptation from the vestibular and peripheral system for motor control and balance.
An overview of water quality regulation or standards in swimming pools, drinking water, and hot springs in Germany, Canada, and Colombia
Encuentro Internacional de Educación en Ingeniería
Este artículo detalla las regulaciones en la calidad del agua en piscinas y agua potable en Alema... more Este artículo detalla las regulaciones en la calidad del agua en piscinas y agua potable en Alemania, Canadá y Colombia, con una comparación con la regulación existente y los estándares de calidad de las aguas termales. Canadá, Alemania y Colombia regulan que el agua potable debe estar libre de niveles inseguros de sustancias y patógenos, especificando los parámetros microbiológicos y químicos que deben seguirse. Las piscinas en Canadá, Alemania y Colombia tienen regulaciones o estándares específicos para parámetros microbiológicos y químicos que deben seguirse. Al igual que la regulación del agua potable, el agua debe estar libre de organismos patógenos para conservar su calidad de agua. Por otro lado, en el caso de aguas termales donde el bañista tiene condiciones similares a las de las piscinas, Canadá y Alemania no cuentan con regulaciones o normas específicas para el agua de aguas termales. En cambio, se aplican a las aguas termales los mismos requisitos microbianos y químicos ...
Encuentro Internacional de Educación en Ingeniería ACOFI 2021
Hot springs have traditionally been a tourist attraction in many parts of the world, such as Japa... more Hot springs have traditionally been a tourist attraction in many parts of the world, such as Japan, Canada, Taiwan among others. During the peak tourist season, it is usually discharged into streams without treatment, which can affect the quality of the receiving water, causing negative impacts to the aquatic ecosystems. Downstream ecological impacts of several major spa recreational sites in different parts of the world have been studied, and it has been found that wastewater discharges of hot springs have adverse ecological effects. The mineral composition in hot springs, derived mainly from groundwater, is usually greater than that of stream water. Studies carried out with models such as QUAL2K (or Q2K), the modernized version of the QUAL2E (or Q2E), simulate the effect of the hot spring discharges on surface water sources, mainly negative in nature. Despite the negative consequences of the impacts on ecosystems derived from hot springs’ wastewater, it is interesting to note that...
2020 Congreso Internacional de Innovación y Tendencias en Ingeniería (CONIITI)
The objective of this study is to discuss selected viruses including COVID-19 and their potential... more The objective of this study is to discuss selected viruses including COVID-19 and their potential elimination processes in hot springs. Studies in Colombia are limited and this scientific discussion provides necessary information regarding these viruses. This includes studies both in Colombia and international levels on the following subjects: i) the presence of viruses in hot springs, ii) the non-oxidative water treatment in hot springs, iii) the elimination strategies of viruses; and iv) the influence of COVID-19 in hot springs. The results of this discussion indicate that in order for thermal waters to guarantee the elimination of the viruses originating from faecal and nonfaecal derived, and the COVID-19 virus, a monitoring scheme is required to identify an effective disinfection of waters to control these pathogens.
Preventive measures pertaining to COVID-19 in swimming pools and hot springs in Europe, Canada, United States, and Colombia
2021 Congreso Internacional de Innovación y Tendencias en Ingeniería (CONIITI), 2021
The objective of this study is to present a preventive measures pertaining to COVID-19 in swimmin... more The objective of this study is to present a preventive measures pertaining to COVID-19 in swimming pools and hot springs in Europe, Canada, United States, and Colombia. After the start of pandemic, all swimming pools, beaches, and hot springs in Colombia were closed. Currently, official management plans have yet to be presented for the opening of hot springs and swimming pools. However, the European Association of Water Parks presents a two-stage reopening plan for public recreation centres, while countries such as United States, Australia, Canada, China, and Austria follow similar measures. Among the most representative management measures mandated to prevent the spread of the virus, medical authorities from a variety of governments have collectively recommended the following: i) maintaining rigorous social distancing, ii) cleaning or disinfection of surfaces and common areas routinly, iii) maintaining healthy environments and most importantly, iv) personal care (ie. if not feeling well, stay home and do not put others at risk).
Yuly Sánchez, Mehrab Mehrvar, Lynda McCarthy, Edgar Quiñones-Bolaños , Luis Cheu, Jairo Chacón Es... more Yuly Sánchez, Mehrab Mehrvar, Lynda McCarthy, Edgar Quiñones-Bolaños , Luis Cheu, Jairo Chacón Escuela Colombiana de Ingeniería “Julio Garavito”, Bogotá, Colombia. yuly.sanchez@escuelaing.edu.co Department of Chemical Engineering, Ryerson University, 350 Victoria Street, Toronto, ON, Canada M5B 2K3. mmehrvar@ryerson.ca Department of Chemistry and Biology, Ryerson University, 350 Victoria Street, Toronto, ON, Canada M5B 2K3. l3mccart@ryerson.ca Environmental Modelling Group, Faculty of Engineering, University of Cartagena, 130010 Cartagena, Colombia. equinonesb@unicartagena.edu.co Escuela Colombiana de Ingeniería “Julio Garavito”, Bogotá, Colombia. luis.rodriguez@escuelaing.edu.co Escuela Colombiana de Ingeniería “Julio Garavito”, Bogotá, Colombia. jairo.chacon@escuelaing.edu.co
Estado Del Arte De La Calidad Del Agua Termal
E n este articulo se muestra el estado del arte de la calidad del agua termal, donde los estudios... more E n este articulo se muestra el estado del arte de la calidad del agua termal, donde los estudios referentes al tema en Colombia son limitados. Por lo cual, se consulto bibliografia no solo a nivel nacional sino internacional, donde se evidencio que existe regulacion para microorganismos patogenos, donde la normatividad revisada no permite la alteracion de las caracteristicas naturales del agua termal, solo una renovacion del agua, limitando el tratamiento de estas aguas. Las investigaciones realizadas en tratamientos de agua termal sin afectar su composicion minero medicinal, como: Ozono, Rayos UV, electrolisis y nanotecnologia, muestran limitaciones en el control de los microorganismos patogenos
Definición de un índice de funcionalidad y realimentación de esfuerzos en prótesis de mano
The general objective of this doctoral thesis is the characterization of the hand prosthesis to s... more The general objective of this doctoral thesis is the characterization of the hand prosthesis to study and develop a methodology for prosthesis evaluation and, in this way, to contribute to further design improvements. With this goal, the work has been oriented to the definition of an quantifiable indicator that allows the evaluation of the attributes considered as the most adequate to consider in the design of new hand prosthesis. This study has motivated, in turn, the evaluation of the way the tactile pressure and force of grasping can be fed back to the prosthesis user, using electro-stimulation to restore the perception of the lost prehensile sensations caused by the missing member. The thesis considers both, scientific and technical aspects. The scientific aspect is based on concepts of the areas artificial robotic-hands, and rehabilitation learning starting from statistical analysis of experimental results. These concepts are used for the prosthesis evaluation and of the learning of the system of feedback of the perception. On the other hand, in the technical aspect, the foundations for their development are framed in the areas of electronic technology, computer science and processing of biomedical signals. The scientific specific objectives were centered, in the first place, in determining whether it is possible to establish the most relevant parameters in the evaluation of the functionality of prosthesis, those which are evaluated on the commonly used prosthesis in rehabilitation as well as those more advanced but still in their experimental phase. The result of this study has been the definition of an index of functionality. The second scientific objective derives from the analysis of controlability of the prosthesis by the user itself.
This academic paper presents the state of Colombia's undergraduate education in Biomedical En... more This academic paper presents the state of Colombia's undergraduate education in Biomedical Engineering. Programs of the European Union and of the United States were reviewed. In the national level, fifteen programs of different higher education institutions were reviewed under the category of Biomedical Engineering and Bioengineering, based on three information sources: University official Website, Information System on higher education and work observatory of the National Education Ministry. It was found that the total offer of national undergraduate programs in Biomedical Engineering and Bioengineering in Bogota D.C represents the 30% of the total offer in the country, Antioquia (Medellin) represents the 27%, Valle del Cauca (Cali) the 13% and the other departments represent the 30% left. The undergraduate programs in Biomedical Engineering show similar standards regarding length, and professional developing competences with slight differences in the graduation profiles and th...
A human gait temporal parameters calculation algorithm
IFMBE Proceedings, 2017
This paper presents a new algorithm to calculate three temporal parameters of human gait: cadence... more This paper presents a new algorithm to calculate three temporal parameters of human gait: cadence, swing time and stride time. These values are computed from: heel-strike time, toe-off time and mid-swing point time which can be in turn obtained from the first time derivate of the medio-lateral axis angular velocity of both shanks. The results generated by the proposed algorithm were validated with those of the commercial software Tech MCS Studio of Technaid. The comparison gives a mild difference for cadence and stride time. Aditionally, the new algorithm is a good alternative to the thresholding-based algorithms previously reported in the literature which require a great amount of work dedicated to the manual tuning of their multiple parameters.
Data in Brief, 2020
This article presents a five-part dataset for human gait analysis in a healthy older adult popula... more This article presents a five-part dataset for human gait analysis in a healthy older adult population (37 women and seven men; age 69.98 ± 8.57 years, body mass index 27.71 ± 4.57). Part 1 compromises demographic data for the 44 participants, along with the results of the Short Physical Performance Battery (SPPB) motor function test and the Mini-Mental State Examination (MMSE). We used the MMSE to ensure the participants could understand the experimental protocol instructions. Part 2 presents the anthropometric measurements of the participants. Part 3 shows the results for each item of the Gait component of the Performance Oriented Mobility Assessment (POMA-G). Part 4 contains five files per participant, storing motion-capture data for the lower limb in the Coordinate 3D (C3D) format. These files were generated using a Vicon motion analysis system, consisting of 24 reflective markers and seven cameras (Vantage V5) sampled at 100 Hz. Part 5 contains 26 gait parameters for each C3D file obtained using Nexus 2.9.3. The dataset is available in a Mendeley repository (Reserved
Development of a Zigbee platform for bioinstrumentation
Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference, 2010
This paper presents the development of a network platform which allows connecting multiple indivi... more This paper presents the development of a network platform which allows connecting multiple individual wireless devices for transmitting bioelectrics and biomechanics signals for application in a hospital network, or continuous monitoring in a patient's diary life. The Zigbee platform development proposal was made in three stages: 1) Hardware development, including the construction of a prototype network node and the integration of sensors, (2) Evaluation, in order to define the specifications of each node and scope of communication and (3) The Zigbee Network Implementation for bioinstrumentation based on ZigBee Health Care public application profile (ZHC). Finally, this work presents the experimental results based on measurements of Lost Packets and LQI (Link Quality Indicator), and the Zigbee Platform configuration for Bioinstrumentation in operation.
Revista Mexicana de Ingeniería Biomédica, 2016
This paper aims to present a state of the art concerning the contributions of electronic sciences... more This paper aims to present a state of the art concerning the contributions of electronic sciences to the problem of falls in elder population. The studied literature was classified based on a taxonomy proposed by the authors, consisting of 8 thematic areas which are: etiology, epidemiology, prediction, consequences, prevention, measurement, detection of falls and detection of daily activities. From the literature review, it was concluded that the most important contributions of the electronic sciences emerge from the development of motion capture devices as well as from the different algorithms proposed to process the resulting information generated by these devices. Thanks to the combination of these two aspects (algorithms and devices) it was possible to measure accurately variables as walking speed, length, and duration of the step, the position of the center of gravity and postural balance. The measurement of these variables, in turn, has introduced significant advances in the f...
2012 4th IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics (BioRob), 2012
This paper presents a new tool for assessment and therapy in post-stroke upper-limb rehabilitatio... more This paper presents a new tool for assessment and therapy in post-stroke upper-limb rehabilitation and a new wireless sensor technology to enhance rehabilitation robotics based on the ZigBee network of wearable Inertial Measurement Units (IMU) and Surface Electromyography (sEMG) sensor nodes. These sensor nodes will allow the measurement of kinematic and electrical muscle activity of patients in continuous therapy motion over all body segments as a Body Sensor Network (BSN). The IMU Sensor design was based on a direction-cosine-matrix DCM. The system validation was achieved with an optical motion tracking system in which cameras and IMU sensors recorded upper limb positions simultaneously during a standard gesture of reaching and grasping. The comparison between elbow flexion-extension angle in reaching and grasping movements obtained from both techniques shows equivalence. The analysis of IMU data signals for several movements demonstrates high repeatability intra and inter-subjects. I. INTRODUCTION stroke is the consequence of cell death within the brain relating to either internal bleeding or a blockage in one of the two main supplying arteries. Currently, it represents a major problem in clinical medicine being a leading cause of disability in the developed world [1]. Worldwide, 15 million people suffer a stroke, of which, 5 million die and another 5 million are left permanently disabled. Strokes are uncommon in people under 40 years; when they do occur, the main risk factor is high blood pressure [2]. Strokes remain a major public health concern in the United States, with more than 795,000 cases diagnosed annually. Over 50% of subjects present some paresis [3].
2008 2nd IEEE RAS & EMBS International Conference on Biomedical Robotics and Biomechatronics, 2008
This paper describes a sensor based control that releases the user from the continuous attention ... more This paper describes a sensor based control that releases the user from the continuous attention usually required in opening and closing actions. Further to this local control, the sensory information is used to generate some feedback to the user for the perception of the progress of the hand operation. We are also presented a study and result about the learning and adaptation of the electric signals that are used for the feedback in user and patients in UPC and Vall d´Hebron Hospital.
Development of a system based on 3D vision, interactive virtual environments, ergonometric signals and a humanoid for stroke rehabilitation
Computer Methods and Programs in Biomedicine, 2013
This paper presents a stroke rehabilitation (SR) system for the upper limbs, developed as an inte... more This paper presents a stroke rehabilitation (SR) system for the upper limbs, developed as an interactive virtual environment (IVE) based on a commercial 3D vision system (a Microsoft Kinect), a humanoid robot (an Aldebaran's Nao), and devices producing ergonometric signals. In one environment, the rehabilitation routines, developed by specialists, are presented to the patient simultaneously by the humanoid and an avatar inside the IVE. The patient follows the rehabilitation task, while his avatar copies his gestures that are captured by the Kinect 3D vision system. The information of the patient movements, together with the signals obtained from the ergonometric measurement devices, is used also to supervise and to evaluate the rehabilitation progress. The IVE can also present an RGB image of the patient. In another environment, that uses the same base elements, four game routines--Touch the balls 1 and 2, Simon says, and Follow the point--are used for rehabilitation. These environments are designed to create a positive influence in the rehabilitation process, reduce costs, and engage the patient.
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Papers by Luis Eduardo Rodriguez Cheu