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Barron-Estrada M.L.,Technological Institute of Culiacan | Zatarain-Cabada R.,Technological Institute of Culiacan | Beltran V.J.A.,Technological Institute of Culiacan | Cibrian F.L.R.,Technological Institute of Culiacan | Perez Y.H.,Electric Research Institute of Mexico
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2012

In this paper we present an intelligent and affective tutoring system designed and implemented within a social network. The tutoring system evaluates cognitive and affective aspects and applies fuzzy logic to calculate the exercises that are presented to the student. We are using Kohonen neural networks to recognize emotions through faces and voices and multi-attribute utility theory to encourage positive affective states. The social network and the intelligent tutoring system are integrated into a Web application. We present preliminary results with different groups of students using this software tool. © Springer-Verlag Berlin Heidelberg 2012.


PubMed | National Autonomous University of Mexico, Universidad de Las Americas Puebla, Technological Institute of Culiacan and Autonomous University of the State of Morelos
Type: Journal Article | Journal: Environmental technology | Year: 2016

Electrochemical techniques have been used for the discolouration of synthetic textile industrial wastewater by Fentons process using a parallel plate reactor with a reticulated vitreous carbon (RVC) cathode. It has been shown that RVC is capable of electro-generating and activating H2O2 in the presence of Fe(2+) added as catalyst and using a stainless steel mesh as anode material. A catholyte comprising 0.05M Na2SO4, 0.001M FeSO4.7H2O, 0.01M H2SO4 and fed with oxygen was used to activate H2O2.The anolyte contained only 0.8M H2SO4. The operating experimental conditions were 170mA (2.0V


Diaz-Rodriguez M.,University of Los Andes, Venezuela | Bautista-Quintero R.,Technological Institute of Culiacan | Carretero J.A.,University of New Brunswick
Mechanisms and Machine Science | Year: 2015

This paper presents and compares three approaches for solving the inverse dynamic model of a general 3-PRS parallel manipulator. The first method obtains the inverse dynamic model by describing the manipulator as three open kinematic chains. Then, the vector-loop closure constraints introduce the relationship between the dynamics of the open kinematic chains and the original closed loop chains. The second method exploits the characteristic of parallel manipulators such that the platform and the links are considered as subsystems. The third method is similar to the second method but uses a different formulation of the Jacobian matrix. This work provides some insight on some advantages and/or disadvantages on how to formulate the dynamic model of a lower mobility parallel manipulator, which can be considered in topic such as the optimal design, parameter identification, and model-based control. © Springer International Publishing Switzerland 2015.


Cabada R.Z.,Technological Institute of Culiacan | Barron Estrada M.L.,Technological Institute of Culiacan | Reyes Garcia C.A.,National Institute of Astrophysics, Optics and Electronics
Expert Systems with Applications | Year: 2011

This paper presents a Web 2.0 Learning Environment, for a systematic creation of adaptive and intelligent tutoring systems. Authoring contents is made by a community of users including teachers and students. The tutoring systems adapt the contents according to the best learning style using self-organizing maps (SOMs). The SOM was trained for classifying Felder-Silverman learning styles. The most important advantage of these unsupervised neural networks is that they do not require an external teacher for presenting a training set. The approach was implemented under an authoring tool that allows the production of personalized learning material to be used under collaborative and mobile learning environments. The tutoring systems together with the neural network can also be exported to mobile devices. We present different results to the approach working under the authoring tool. © 2011 Published by Elsevier Ltd.


Zatarain-Cabada R.,Technological Institute of Culiacan | Barron-Estrada M.L.,Technological Institute of Culiacan | Gonzalez-Hernandez F.,Technological Institute of Culiacan | Reyes-Garcia C.A.,National Institute of Astrophysics, Optics and Electronics
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2016

In this paper we want to show that besides cognitive factors like reasoning and memorization, the motivational factor is a crucial one for learning a first programming language. We have developed and evaluated an affective and intelligent learning environment (ILE) for learning Java. The ILE was tested with high-school students where affect recognizing was only used with university students. We present results and discussions of the experiments. © Springer International Publishing Switzerland 2016.


Santiesteban-Cos R.,Technological Institute of Culiacan
2015 European Control Conference, ECC 2015 | Year: 2015

In this work, a dynamic feedback control law based on the well known 'Twisting' algorithm is under study. Dynamic compensation is added to the Twisting algorithm, in order to use position feedback only, and keep properties such as finite time stability. Moreover, linear terms are considered to improve the robustness of the algorithm. In some mechanical applications, an observer or a differentiator design is required for control purposes when the whole state space is not available for measurement. An alternative solution for this problem is proposed: a finite time stable algorithm that uses dynamic position feedback. Indeed, this new proposal does not require to measure or estimate another signal but the position of the mechanical system. In the stability analysis, strict nonsmooth Lyapunov functions and homogeneity properties are used in order to show finite time stability and robustness. Based on the proposed algorithm, a control law for a one-link pendulum affected by Coulomb friction and bounded external perturbations is designed. © 2015 EUCA.


Zatarain-Cabada R.,Technological Institute of Culiacan | Barron-Estrada M.L.,Technological Institute of Culiacan
International Journal of Continuing Engineering Education and Life-Long Learning | Year: 2013

Knowledge societies also named learning social networks allow interaction and collaboration between individuals (instructors and students), who share their connections under a scheme of learning communities around common learning interest. In this paper, we present an affective tutoring system inside a knowledge society implemented in a learning social network. We have designed a new architecture for an entire system that includes the social network with an educational approach, and a set of intelligent tutoring systems for mathematics learning which analyse and evaluate cognitive and affective aspects of the learners. The intelligent tutoring systems were developed based on different theories, concepts and technologies. In this paper, we present an affective tutoring system embedded in a social network which is used to improve poor student results in ENLACE test (National Assessment of Academic Achievement in Schools in Mexico). We also present results when applying the tutoring system to a group of students. Copyright © 2013 Inderscience Enterprises Ltd.


Cabada R.Z.,Technological Institute of Culiacan | Estrada M.L.B.,Technological Institute of Culiacan | Edgar P.L.,Technological Institute of Culiacan | Garcia C.A.R.,National Institute of Astrophysics, Optics and Electronics
Proceedings of the 2011 11th IEEE International Conference on Advanced Learning Technologies, ICALT 2011 | Year: 2011

This paper presents an interpreter to display educational content in mobile devices, adaptable to the way that each user learns, with the added value of allowing students to carry out the learning process at any time and any place. The educational content is tailored to the student's learning style according to the model of Felder-Silverman. The identification of the student's learning style is performed using self-organizing maps. The operation of the tool presented, is based on techniques such as parsing XML files and deployment of user interfaces on mobile devices. © 2011 IEEE.


Barron-Estrada M.L.,Technological Institute of Culiacan | Zatarain-Cabada R.,Technological Institute of Culiacan | Garcia C.A.R.,National Institute of Astrophysics, Optics and Electronics
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2010

Teaching a course in compiler construction is considered always a challenge because there are several problems to be addressed as time, complexity and motivation of students. In this paper, we present a hybrid learning approach along with a tool for use with courses of compiler construction. The key to our method is to combine theoretical and practical topics of the course using various technologies such as mobile learning, intelligent tutoring systems, learning social networks with direct learning. The ultimate goal is to stimulate the student's abilities to work creatively, collaboratively or individually, as well as their ability to solve complex problems. © Springer-Verlag 2010.


Estrada A.,National Autonomous University of Mexico | Loria A.,Supelec | Santiesteban R.,Technological Institute of Culiacan | Fridman L.,CINVESTAV
IMA Journal of Mathematical Control and Information | Year: 2013

We present a result on stabilization of strict feedback systems with unknown disturbances based on the so-called twisting algorithm, a second-order sliding mode controller for the double integrator. The novelty of the note relies in the stability analysis of the closed-loop system and the relaxation of stability conditions (we do not assume boundedness of trajectories). The proof of the main result is constructed along similar lines as for well-established theorems for nonlinear time-varying systems in cascade, with continuous right-hand sides. Although we restrict our analysis to second-order systems, the purpose of this note is to settle the basis for a methodological stability analysis approach for higher-order systems in strict feedback form, under the influence of uncertain perturbations. An illustrative example is provided. © 2012 The authors.

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