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Cuevas A.,CINVESTAV | Lorias D.,CINVESTAV | Minor A.,CINVESTAV | Gutierrez J.A.,Technological Institute of Morelia | Martinez R.,Autonomous University of Mexico State
Proceedings - IEEE Symposium on Computer-Based Medical Systems

This paper describes the design and development of a training system for minimally invasive surgery skills in the field of otolaryngology. The main purpose of the system is for the surgical residents to gain experience and practice. In order to provide the surgeon a practical interaction environment, training modules and an evaluation methodology are proposed. The methodology consists of a series of tasks which help to develop and evaluate the surgeon skills based on precision and time. A custom MATLAB code records and evaluates surgeon's performance on each task, giving the resident the chance of following a trend of progress. © 2013 IEEE. Source

Lorias Espinoza D.,National Polytechnic Institute of Mexico | Ordorica Flores R.,Federico Gomez Childrens Hospital of Mexico | Minor Martinez A.,National Polytechnic Institute of Mexico | Gutierrez Gnecchi J.A.,Technological Institute of Morelia
Journal of Laparoendoscopic and Advanced Surgical Techniques

Background: Various methods for evaluating laparoscopic skill have been reported, but without detailed information on the configuration used they are difficult to reproduce. Here we present a method based on the trigonometric relationships between the instruments used in a laparoscopic training platform in order to provide a tool to aid in the reproducible assessment of surgical laparoscopic technique. Materials and Methods: The positions of the instruments were represented using triangles. Basic trigonometry was used to objectively establish the distances among the working ports RL, the placement of the optical port h′, and the placement of the surgical target OT. Results: The optimal configuration of a training platform depends on the selected working angles, the intracorporeal/extracorporeal lengths of the instrument, and the depth of the surgical target. We demonstrate that some distances, angles, and positions of the instruments are inappropriate for satisfactory laparoscopy. Conclusions: By applying basic trigonometric principles we can determine the ideal placement of the working ports and the optics in a simple, precise, and objective way. In addition, because the method is based on parameters known to be important in both the performance and quantitative quality of laparoscopy, the results are generalizable to different training platforms and types of laparoscopic surgery. © 2014, Mary Ann Liebert, Inc. Source

Torres Garcia V.,Technological Institute of Morelia | Ruiz Paredes H.,Technological Institute of Morelia
CCE 2011 - 2011 8th International Conference on Electrical Engineering, Computing Science and Automatic Control, Program and Abstract Book

A High Impedance Fault (HIF) is generated when an overhead power line physically breaks and falls to the ground or when two phases make contact with a solid grounding. Such faults are difficult to detect in Electrical Distribution Systems and often draw small currents which cannot be detected by conventional protection. Furthermore, arcing accompanies high impedance fault, resulting in a fire hazard, damage to electrical devices and risk to human life. This paper presents a technique based on Discrete Wavelet Transform (DWT) for high impedance fault detection in power distribution system. The algorithm is based on a windowing approach of DWT. © 2011 IEEE. Source

Mena L.J.,Polytechnic University of Sinaloa | Felix V.G.,Polytechnic University of Sinaloa | Ostos R.,Polytechnic University of Sinaloa | Gonzalez J.A.,National Institute of Astrophysics, Optics and Electronics | And 6 more authors.
Computational and Mathematical Methods in Medicine

The ARVmobile v1.0 is a multiplatform mobile personal health monitor (PHM) application for ambulatory blood pressure (ABP) monitoring that has the potential to aid in the acquisition and analysis of detailed profile of ABP and heart rate (HR), improve the early detection and intervention of hypertension, and detect potential abnormal BP and HR levels for timely medical feedback. The PHM system consisted of ABP sensor to detect BP and HR signals and smartphone as receiver to collect the transmitted digital data and process them to provide immediate personalized information to the user. Android and Blackberry platforms were developed to detect and alert of potential abnormal values, offer friendly graphical user interface for elderly people, and provide feedback to professional healthcare providers via e-mail. ABP data were obtained from twenty-one healthy individuals (>51 years) to test the utility of the PHM application. The ARVmobile v1.0 was able to reliably receive and process the ABP readings from the volunteers. The preliminary results demonstrate that the ARVmobile 1.0 application could be used to perform a detailed profile of ABP and HR in an ordinary daily life environment, bedsides of estimating potential diagnostic thresholds of abnormal BP variability measured as average real variability. © 2013 Luis J. Mena et al. Source

Perez-Labra M.,Autonomous University of the State of Hidalgo | Ramos-Banderas A.,Technological Institute of Morelia | Avila-Davila E.O.,Technological Institute of Pachuca | Romero-Serrano J.A.,ESIQIE IPN UPALM | And 3 more authors.
Materials Science and Technology Conference and Exhibition 2015, MS and T 2015

Fluid flow behavior and inclusions removal in a continuous casting tundish equipped with a turbulence inhibitor (TI) and a gas curtain (GC) were mathematically modelling. The fluid flow and the inclusions removal was modeled using the k-s model; the inclusion trayectories and the gas flow behavior were modeled with the Eulerian-Lagrangian and Eulerian-Eulerian models, respectively. Three cases were studied for a constant gas flow rate of 596 ml/min. The arrangement whit TI and GC located 0.12 m before the nozzle outlet presents the highest alumina inclusion removal in the slag phase (79.44 %). The mathematical simulation results were in agreement with physical modeling results. © Copyright 2015 MS& T15®. Source

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