Autonomous University of Colombia

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Bogota, Colombia

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Pena J.E.A.,Autonomous University of Colombia | Bustamante R.A.G.,Autonomous University of Colombia
LAMC 2016 - IEEE MTT-S Latin America Microwave Conference | Year: 2016

This paper has to purpose to present an correlation analysis between propagation models used for the design of an DVB-T2 network using ICS Telecom software design in an urban scenario of the city of Bogota (Colombia). A comparison of empirical propagation models and deterministic propagation models is performed using the results of simulations and field measurements (drive test) to establish the performance of each of the propagation models in the study area. Correlation results showed that empirical and semiempirical models present slightly better performance that deterministic models. © 2016 IEEE.


Jimenez Moreno R.,Autonomous University of Colombia | Brito M. L.,Autonomous University of Colombia
2014 IEEE Biennial Congress of Argentina, ARGENCON 2014 | Year: 2014

This article describes the development of a path generating system for the movement of a remote commanded robotic mobile, through machine vision techniques and fuzzy decision systems. Using a Kinect sensor, the system captures the motion area of the mobile and using image processing techniques, obstacles are segmented and a fuzzy clustering algorithm is implemented to define the possible paths to follow based on height and ability of mobile to exceed the obstacle. Communication between the mobile and the control system is performing wirelessly using a XBEE device which is centralized into PC software; therefore the robot travels locally through a microcontroller. By the developed algorithm is able to get a travel path with a minimum run time, in which it is possible to change the number of obstacles and approach paths with a slope up to 35 degrees of elevation from the ground. © 2014 IEEE.


Moreno R.J.,Autonomous University of Colombia | Jorge Lopez D.,Autonomous University of Colombia
Symposium of Signals, Images and Artificial Vision - 2013, STSIVA 2013 | Year: 2013

This article describes the development of a trajectory planning system which controls the movement of a tele-commanded mobile robot through machine vision techniques and fuzzy algorithms. Using a conventional camera, the scene in which the mobile is moving is captured. Then, by means of image processing techniques, the obstacles are segmented and using a variation of the fuzzy c-means algorithm, the possible paths to follow are delimited. The communication between the mobile and the central control system on a PC is done wirelessly via XBEE, so that the robot moves locally using a microcontroller. Using the developed algorithm it is possible to get a direct travel path without crashes, in which it is possible to vary the number of obstacles and where the traveling time is minimized. © 2013 IEEE.


Moreno R.J.,Autonomous University of Colombia
2014 3rd International Congress of Engineering Mechatronics and Automation, CIIMA 2014 - Conference Proceedings | Year: 2014

This paper presents the implementation of an autonomous mobile robot which is capable of avoiding obstacles while it moves by means of an ultrasonic detection system and aims to find human faces. In a disaster such as a landslide or earthquake, where is possible that the initial condition of danger persists as would be the case of an earthquake, in which within a building, beams and parts of the structure remain committed, as well as the people who risk their lives finding victims. In response, the designed robot provides a solution by using artificial intelligence algorithms and image processing running on embedded systems. The obtained results allow the robot to move autonomously avoiding obstacles and stopping when it finds a human face. © 2014 IEEE.


Moreno R.J.,Autonomous University of Colombia
2014 19th Symposium on Image, Signal Processing and Artificial Vision, STSIVA 2014 | Year: 2015

This article presents the development of machine vision algorithms that allows to manipulate two robotic arms by the operator, replicating the movements of his own arms, accomplishing control of four degrees of freedom per arm. The development is aimed to provide an environment of natural, wireless and non-invasive control, providing security to the operator in the face of achievement of unsafe tasks, either for removal of hazardous, explosive or radioactive materials, as well as possibly toxic environments or just remote control from a remote site. The tracking algorithm of the two arms is based on their detection using the skeleton tool of Microsoft Kinect sensor, as well as image processing algorithms like color space conversion, segmentation and thresholding to control the gripper arm. It was possible to obtain real-time control of the arms to four degrees of freedom, according to the monitoring of the arms of the operator in the ranges of sensor coverage. © 2014 IEEE.


Aquino-Santos R.,University of Colima | Martinez-Castro D.,Autonomous University of Colombia | Edwards-Block A.,University of Colima | Murillo-Piedrahita A.F.,Autonomous University of Colombia
Sensors (Switzerland) | Year: 2013

This paper introduces wireless sensor networks for Ambient Assisted Living as a proof of concept. Our workgroup has developed an arrhythmia detection algorithm that we evaluate in a closed space using a wireless sensor network to relay the information collected to where the information can be registered, monitored and analyzed to support medical decisions by healthcare providers. The prototype we developed is then evaluated using the TelosB platform. The proposed architecture considers very specific restrictions regarding the use of wireless sensor networks in clinical situations. The seamless integration of the system architecture enables both mobile node and network configuration, thus providing the versatile and robust characteristics necessary for real-time applications in medical situations. Likewise, this system architecture efficiently permits the different components of our proposed platform to interact efficiently within the parameters of this study. © 2013 by the authors; licensee MDPI, Basel, Switzerland.


Pena J.E.A.,Autonomous University of Colombia
2016 IEEE International Engineering Summit, IE-Summit 2016 | Year: 2016

This paper has to purpose to present an analysis of correlation between propagation models used for the design of an LTE-A network using the design networks tool ICS Telecom in an urban scenario of the city of Bogota (Colombia). A comparison of empirical propagation models and deterministic propagation models is performed using the results of simulations and field measurements (drive test) to establish the performance of each of the propagation models in the study area. Analysis of correlation results showed that geometrical models present better performance that empirical models. © 2016 IEEE.


Martinez D.,Autonomous University of Colombia | Gonzalez A.,University of Colima | Blanes F.,Polytechnic University of Valencia | Aquino R.,University of Colima | And 2 more authors.
Sensors | Year: 2011

A current trend in the development and implementation of industrial applications is to use wireless networks to communicate the system nodes, mainly to increase application flexibility, reliability and portability, as well as to reduce the implementation cost. However, the nondeterministic and concurrent behavior of distributed systems makes their analysis and design complex, often resulting in less than satisfactory performance in simulation and test bed scenarios, which is caused by using imprecise models to analyze, validate and design these systems. Moreover, there are some simulation platforms that do not support these models. This paper presents a design and validation method forWireless Sensor and Actuator Networks (WSAN) which is supported on a minimal set of wireless components represented in Colored Petri Nets (CPN). In summary, the model presented allows users to verify the design properties and structural behavior of the system. ©2011 by the authors.


Valencia J.H.A.,Autonomous University of Colombia | Pena J.E.A.,Autonomous University of Colombia
2014 IEEE Colombian Conference on Communications and Computing, COLCOM 2014 - Conference Proceedings | Year: 2014

This paper takes a brief description of a series of radio propagation simulation of MIMO (Multiple Input Multiple Output) multiantenna systems in the areas of La Candelaria and La Castellana in Bogota DC (Colombia), using specialized software ICS Designer and digital high resolution cartography. A comparison between the types of multiantenna systems MU-MIMO (Multi User MIMO), SU-MIMO-SD (Single User MIMO Spatial Diversity), SU-MIMO-SM (Single User MIMO Spatial Multiplexing) and standard antennas is performed. The results allow to characterize these considerations have multiantenna systems used by the LTE (Long Term Evolution) technology adopted in Colombia by operators such as mobile telecommunications system fourth generation (4G). © 2014 IEEE.


Garcia-Perdomo H.A.,Autonomous University of Colombia | de la Hoz G.E.,Free University of Colombia
Urologia Colombiana | Year: 2016

Purpose: To determine the effectiveness of using a pedagogic strategy based on information and communications technology (ICT) on the meaningful learning of urological concepts in medical students. Methods: This was a mixed research (quantitative and qualitative). A pedagogic strategy based on ICT was implemented. The students were divided into two groups, the experimental group received the ICT based strategy, and the control group the conventional activities. The learning focus and their basic knowledge were assessed at the beginning and at the end of the meaningful learning. A checklist, a portfolio, a questionnaire and a semi-structured interview were used. Stata 13 and Dedoose were used for the statistical analysis. Results: No differences were found between the type of learning focus and the meaningful learning of the students. There was an appropriate knowledge in some specific urological topics, an adequate topic discussion and development of the duties. Important elements were also found in the learning process to discuss and gather knowledge in order to interact with patients. Conclusions: There is no evidence that using a pedagogic strategy based on ICT is more effective than using the conventional strategy to improve meaningful learning by medical Students. © 2016 Sociedad Colombiana de Urología.

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