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Bermeo N.V.,ITESM Campus Estado de Mexico | Mendoza M.G.,ITESM Campus Estado de Mexico | Castro A.G.,Florida State University
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2013

The design process of a product is iterative due to a series of changes that range from client specifications to quality defects. From each of such changes, designers end up with a considerable amount of design files, additionally, if files have to be exchanged with other partners they have to be translated based on the available neutral file formats. In order to identify specific elements stored on the resulting translated files, the designer needs to make use of a CAD system. If the amount of files to consult is significant, the task becomes excessively time consuming. The approach presented here, focuses on the creation of semantic models providing the user; query capabilities over a collection of CAD models in order to identify a specific design based on particular conditions along with exploration capabilities to detect key elements from any IGES CAD file. Both capabilities possible without the need of using a CAD system. © Springer-Verlag 2013.


Kirschel A.N.G.,University of Cyprus | Kirschel A.N.G.,University of California at Los Angeles | Kirschel A.N.G.,University of Oxford | Cody M.L.,University of California at Los Angeles | And 4 more authors.
Ibis | Year: 2011

The ability to monitor interactions between individuals over time can provide us with information on life histories, mating systems, behavioural interactions between individuals and ecological interactions with the environment. Tracking individuals over time has traditionally been a time- and often a cost-intensive exercise, and certain types of animals are particularly hard to monitor. Here we use canonical discriminant analysis (CDA) to identify individual Mexican Ant-thrushes using data extracted with a semi-automated procedure from song recordings. We test the ability of CDA to identify individuals over time, using recordings obtained over a 4-year period. CDA correctly identified songs of 12 individual birds 93.3% of the time from recordings in one year (2009), while including songs of 18 individuals as training data. Predicting singers in one year using recordings from other years indicated some instances of variation, with correct classification in the range of 67-88%; one individual was responsible for the great majority (66%) of classification errors. We produce temporal maps of the study plot showing that considerably more information was provided by identifying individuals from their songs than by ringing and re-sighting colour-ringed individuals. The spatial data show site fidelity in males, but medium-term pair bonds and an apparently large number of female floaters. Recordings can be used to monitor intra- and intersexual interactions of animals, their movements over time, their interactions with the environment and their population dynamics. © 2011 The Authors. Journal compilation © 2011 British Ornithologists' Union.


Cervantes-Lozano P.,ITESM Campus Estado de Mexico | Gonzalez-Perez L.F.,ITESM Campus Guadalajara | Garcia-Garcia A.D.,ITESM Campus Estado de Mexico
Proceedings - 2011 International Conference on Reconfigurable Computing and FPGAs, ReConFig 2011 | Year: 2011

This article presents a complexity and delay analysis of Parallel Sorting Algorithms (PSA) in K-best Sphere-Decoder (K-best SD) receivers in slow-flat Rayleigh fading channels for MIMO (Multiple-Input Multiple-Output) systems. The K-best SD algorithm is a strategic Near-Optimal Spatial-Multiplexing MIMO (SM-MIMO) demodulation solution (due to its trade-off between Bit-Error-Rate performance and algorithmic complexity) that requires sorting procedures for symbol-decoding purposes. Unfortunately, sorting represents a critical data throughput bottleneck for K-best SD architectures. PSA alleviate this situation by providing suitable implementations of sorting algorithms easily adapted to K-best SD architectures. Several versions of the Bubble-Sort (BS) and the Batcher-Sort (BtchS) algorithms are considered for this analysis. © 2011 IEEE.


Camposeco-Negrete C.,ITESM Campus Estado de Mexico
Journal of Cleaner Production | Year: 2013

Machine tools are responsible for environmental impacts owing to their energy consumption. Cutting parameters have been optimized to minimize cutting power, power consumed or cutting energy. However, these response variables do not consider the energy demand that ensures the readiness of the machine tool. The present paper outlines an experimental study to optimize cutting parameters during turning of AISI 6061 T6 under roughing conditions in order to get the minimum energy consumption. An orthogonal array, signal to noise (S/N) ratio and analysis of variance (ANOVA) were employed to analyze the effects and contributions of depth of cut, feed rate and cutting speed on the response variable. A comparison was done to highlight the importance of correctly selecting the response variable to be analyzed, due to the difference of the values of cutting parameters needed to optimize cutting power, cutting energy, power consumed and energy consumed during the machining process. Additional, the relationship between cutting parameters, energy consumption, and surface roughness was analyzed in order to determine the levels of the cutting parameters that lead to minimum energy consumption and minimum surface roughness. The results of this research work showed that feed rate is the most significant factor for minimizing energy consumption and surface roughness. Nevertheless, the level of this factor needed to achieve minimum energy consumption is not the same as the one needed to obtain minimum surface roughness. Higher feed rate provides minimum energy consumption but will lead to higher surface roughness. © 2013 Elsevier Ltd. All rights reserved.


Juarez-Carrasco A.,ITESM Campus Estado de Mexico | Chong-Quero J.E.,ITESM Campus Estado de Mexico
Pan American Health Care Exchanges, PAHCE 2011 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Care and Technology Support | Year: 2011

The advances in electronics allow the integration and design of new medical technologies, lots of them used for patient monitoring in order to improve medical diagnoses looking for a better quality of life. In this paper the design of a holter is described using the Bluetooth technology as its wireless communication, the prototype is developed considering battery operation and that the system could be used with any mobile device that supports Bluetooth, data storage and the user interface. © 2011 IEEE.


Moreno-Rios M.,National Polytechnic Institute of Mexico | Gallardo-Hernandez E.A.,National Polytechnic Institute of Mexico | Vite-Torres M.,National Polytechnic Institute of Mexico | Pena-Bautista A.,ITESM Campus Estado de Mexico
Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit | Year: 2016

The aim of this work was to prove that the oil applied to the wheel flange using on-board lubricators not only alters the friction coefficient between wheel and rail but also influences the braking and acceleration performance of trains on one of the lines of the metro in Mexico City. A series of tests were carried out in the presence of an oil lubricant, both in the laboratory and in the field, using a pendulum tester. It was observed that the oil migrated from the rail corner to the top of the rail. In another set of experiments, water was sprayed onto the lubricant on the top of the rail. The results indicated that under these conditions, the friction coefficient has a low value in rail sections where a high value of the friction coefficient is required. Tests with water/oil mixtures presented similar levels of friction to the oil-only tests. A set of tests were performed after the rail surface was cleaned and the oil lubricant and water were applied together. The laboratory and field tests showed similar behaviour trends for the friction coefficient. The pendulum method can be used to assess railhead friction on short-length sections of rail. Points are made regarding the conditioning of the pads and calibration of the pendulum arm. © 2014 Institution of Mechanical Engineers.


Cifuentes-Zapien J.E.,ITESM Campus Estado de Mexico | Valdez-Aguilar J.A.,ITESM Campus Estado de Mexico | Rojas-Correa F.J.,ITESM Campus Estado de Mexico | Chong-Quero J.E.,ITESM Campus Estado de Mexico | Pineda-Olivares A.,ITESM Campus Estado de Mexico
Pan American Health Care Exchanges, PAHCE 2011 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Care and Technology Support | Year: 2011

This paper describes a video game for the rehabilitation of the pronation and supination movements of children with cerebral palsy. It is used as an interface for a robot that is currently under development. The game was programmed in LabVIEW and MATLAB is used for analyzing the results. It simulates a formula one racecar on a racetrack. Its objective is to keep the car inside the racetrack's limits. The pronation and supination movements control the car's horizontal position on the screen. A first preliminary test was done with a healthy 11-year-old right-handed child. The same racetrack was played 5 times with each arm. The results showed that the child had an average difference of 3.32% against the expected path when she used her right arm and an average difference of 3.86% against the expected path when the left arm was used. Future improvements will be taken into account, for example, the use of the robot's motor in order to give assistance or resistance to the arm movements of the patient. © 2011 IEEE.


Sosa O.A.P.,ITESM Campus Estado de Mexico | Quijano Y.,ITESM Campus Estado de Mexico | Doniz M.,ITESM Campus Estado de Mexico | Chong-Quero J.E.,ITESM Campus Estado de Mexico
Pan American Health Care Exchanges, PAHCE 2011 - Conference, Workshops, and Exhibits. Cooperation / Linkages: An Independent Forum for Patient Care and Technology Support | Year: 2011

Brain computer interfaces have been evolving through time, as time passes and new technologies and devices appear, brain computer interfacing suffers the impact of these new technologies. Even though some technologies like MEG or fMRI may enhance BCI capabilities, they present disadvantages; therefore a BCI technology comparison is presented in this paper in order to mention the advantages and disadvantages that each technology provides. © 2011 IEEE.


Modern production is faced with the challenge of reducing the environmental impacts related to machining processes. Machine tools consume large amounts of energy and, as a consequence, environmental impacts are generated owing to this consumption. Many studies have been carried out in order to minimize cutting power, cutting energy or power consumed by the machine tool. Nevertheless, the response variables mentioned before do not take into account the energy required by all the components inside the machine tool during the cutting operation. This paper presents an experimental study related to the optimization of cutting parameters in roughing turning of AISI 6061 T6 aluminum. Energy consumption and surface roughness were minimized, while the material removal rate of the process was maximized. A set of experimental runs was established using a Central Composite Design, and the Response Surface Method was employed to obtain the regression model for the energy consumed during machining, specific energy, surface roughness and material removal rate. The adequacy of the model was proved by Analysis of Variance analysis. The relationship between cutting parameters and the response variables (energy consumption, surface roughness and material removal rate) was analyzed using contour plots. Moreover, the desirability method was used to define the values of the variables that achieved a minimum quantity of specific energy consumed and minimum surface roughness. Feed rate and depth of cut were the most significant factors for minimizing the total specific energy consumed, and for minimizing the surface roughness, feed rate was the most significant factor. Compared to the traditional objective optimization, the optimal turning parameters determined by the proposed optimization method reduced the energy consumption in 14.41%, and the surface roughness in 360.47%. Consequently, sustainability and quality of the machining process were achieved at the same time. © 2014 Elsevier Ltd. All rights reserved.


Echeverry J.M.,ITESM Campus Estado de Mexico | Vasquez V.,ITESM Campus Estado de Mexico | Aguirre J.,ITESM Campus Estado de Mexico | Contreras D.,ITESM Campus Estado de Mexico
SAE Technical Papers | Year: 2015

This document presents a methodology for obtaining the vehicle performance curves and values by means of the OBD2 port for a specific vehicle. In particular the Torque - Power engine curves and acceleration performance following SAE guidelines. Additionally we obtain the wheel dynamic rolling radius to get a more realistic performance. The results obtained are compared to a chassis dynamometer test performed on the same vehicle to prove feasibility for a low cost implementation when there is no access to said testing tools. Copyright © 2015 SAE International.

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