Technological Institute of Culiacan

itculiacan.edu.mx
Culiacan, Mexico
SEARCH FILTERS
Time filter
Source Type

Quinones B.,U.S. Department of Agriculture | Campos Sauceda J.P.,Technological Institute of Culiacan | Lee B.G.,U.S. Department of Agriculture | Yambao J.C.,U.S. Department of Agriculture | Chaidez Quiroz C.,Food Safety National Research Laboratory Research Center in Food and Development Culiacan Sinaloa Mexico
Letters in Applied Microbiology | Year: 2017

The increase in the consumption of fresh produce has correlated with a rise in the number of reported foodborne illnesses. To identify potential risk factors associated with postharvest practices, the present study employed multilocus sequence typing (MLST) for the genotypic classification of Escherichia coli isolates recovered from three sources sampled at seven operational stages in a cantaloupe packinghouse in Northwestern Mexico. The MLST analysis results indicated that the E. coli isolates were classified into 18 different sequence types (ST), and 11 of these STs were found to be novel. ST-171 was the predominant type and was found in 19% (7/36) of the recovered isolates. Interestingly, the novel ST-827 was found to be significantly associated with isolates recovered from workers' hands, sampled during final postwash stages. Further phylogenetic analyses to examine the relatedness of the STs revealed genetic heterogeneity. Fourteen of the identified STs were assigned to known clonal groups, while the remaining four novel STs were distinct and did not cluster with any clonal group. The present study has provided the first evidence indicating that several sources from distinct operational stages in a cantaloupe packinghouse may contribute to a genotypic and phylogenetic diverse set of E. coli isolates. Significance and Impact of the Study: Packinghouses can be considered as a potential source of microbial contamination. Using multilocus sequence typing, this study identified a genotypic and phylogenetic diverse set of Escherichia coli isolates recovered from the surfaces of cantaloupes, workers' hands and processing equipment at a cantaloupe packinghouse. A total of 61% of the sequence types identified were novel, and a distinct sequence type, ST-827, was significantly associated with worker's hands, sampled during the final postwash operational stages in the packinghouse. These findings serve as a baseline to identify potential sources of microbial contamination at distinct operational stages in a cantaloupe packinghouse. © 2017 The Society for Applied Microbiology.


Zatarain-Cabada R.,Technological Institute of Culiacan | Barron-Estrada M.L.,Technological Institute of Culiacan | Rios-Felix J.M.,Technological Institute of Culiacan
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2017

The growing demand for software tools that encourage and support students in learning design and algorithm implementation, has allowed the creation of such software systems. In this paper we present a new and innovative affective tutoring system, for logic and algorithmic programming, based on block techniques. Our approach combines the Google Blockly’s interface with gamification techniques and exercises that are monitored according to the emotional state of the student. Depending on the expressed emotion (boring, engagement, frustration, and neutral), the system evaluates a number of variables to determine whether the student requires assistance. Tests have shown that the detection of the emotional state of the student, affect favorably the student evaluations. © Springer International Publishing AG 2017.


Barron-Estrada M.L.,Technological Institute of Culiacan | Zatarain-Cabada R.,Technological Institute of Culiacan | Lindor-Valdez M.,Technological Institute of Culiacan
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2017

We have developed a novel authoring tool for a programming learning environment that incorporates Gamification as a means of motivation named CodeTrainig. This tool focuses on improving students’ programming skills, and it offers authors not only authorship of resources but also of Gamification associated with them. An author can create courses composed by several resources. Resources are formed, in its finer grain, by programming exercises which have a description of the problem to be solved, a set of test cases, and game elements. Students can participate on courses by solving its programming exercises. As they solve exercises they earn points and rise in a leader board. Moreover, the environment let students enable or disable game components, since some of them might dislike the competitive nature of Gamification. We present some experiments we have made with the authoring tool. © Springer International Publishing AG 2017.


Lozano-Crisostomo N.,Autonomous University of Coahuila | Garcia-Melgarejo J.C.,Autonomous University of Coahuila | Ruiz-Perez V.I.,Technological Institute of Culiacan | Sanchez-Mondragon J.J.,National Institute of Astrophysics, Optics and Electronics
Optics Communications | Year: 2017

We study the effect of linear coupling on nonlinear phase noise in two-core fibers (TCFs). Considering the elementary TCF switching process, we demonstrate reduction of nonlinear phase noise in the propagation of optically amplified pulses through TCFs. Our results show that the reduction occurs just when the first maximum transfer of optical power is carried out between the TCF cores. © 2017 Elsevier B.V.


Rangel H.R.,Technological Institute of Culiacan | Puig V.,Polytechnic University of Catalonia | Farias R.L.,Universidad Michoacana de San Nicolás de Hidalgo | Flores J.J.,Universidad Michoacana de San Nicolás de Hidalgo
Journal of Hydroinformatics | Year: 2017

Efficient management of a drinking water network reduces the economic costs related to water production and transport (pumping). Model predictive control (MPC) is nowadays a quite well-accepted approach for the efficient management of the water networks because it allows formulating the control problem in terms of the optimization of the economic costs. Therefore, shortterm forecasts are a key issue in the performance of MPC applied to water distribution networks. However, the short-term horizon demand forecast in a horizon of 24 hours in an hourly based scale presents some challenges as the water consumption can change from one day to another, according to certain patterns of behavior (e.g., holidays and business days). This paper focuses on the problem of forecasting water demand for the next 24 hours. In this work, we propose to use a bank of models instead of a single model. Each model is designed for forecasting one particular hour. Hourly models use artificial neural networks. The architecture design and the training process are performed using genetic algorithms. The proposed approach is assessed using demand data from the Barcelona water network. © 2017 IWA Publishing.


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.


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.


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.

Loading Technological Institute of Culiacan collaborators
Loading Technological Institute of Culiacan collaborators