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This descriptive study intends to identify the satisfaction perception among the teachers of the Universidad del Valle de México (UVM) concerning the use of the Microsoft Teams platform in the transition from traditional model (face-to-face) to 100% online education [Emergency Remote Teaching (ERT)]. The proposal aims to determine the perspectives of teachers regarding the use of the Microsoft Teams platform during the crisis caused by COVID-19. UVM has 6938 full-time teachers and part-time teachers who collaborated in educational programs during January-June 2020 in the 33 campuses of UVM. And an instrument was developed and applied using finite population sampling, UVM perspective of teachers, which was distributed via Google Forms. The feasibility of the data collection instrument was determined by the Cronbach’s Alpha coefficient, with a result of 0.926. The data collection period was aligned with the first isolation period: 23 March to 20 April. The results in the perception of teacher satisfaction in the different sections of the instrument established an agreement in the answers (very satisfied or satisfied) regarding values that were higher than 60% in terms of satisfaction using the equipment. The analysis of the data collected was performed to verify the proposed hypothesis with the R version 4.0 software. A G-test was performed with the Logverosimilitude coefficient to test whether the categorical variables were independent (qualitative variables that are not defined continuously). The Krammer coefficient of association was then calculated to measure the correlation.
Marco Zamora-Antuñano; Juvenal Rodríguez-Reséndiz; Leticia Rodriguez Segura; Miguel Cruz Pérez; José Altamirano Corro; Wilfrido Paredes-Garcia; Hugo Rodríguez-Reséndiz. Analysis of Emergency Remote Education in COVID-19 Crisis Focused on the Perception of the Teachers. Sustainability 2021, 13, 3820 .
AMA StyleMarco Zamora-Antuñano, Juvenal Rodríguez-Reséndiz, Leticia Rodriguez Segura, Miguel Cruz Pérez, José Altamirano Corro, Wilfrido Paredes-Garcia, Hugo Rodríguez-Reséndiz. Analysis of Emergency Remote Education in COVID-19 Crisis Focused on the Perception of the Teachers. Sustainability. 2021; 13 (7):3820.
Chicago/Turabian StyleMarco Zamora-Antuñano; Juvenal Rodríguez-Reséndiz; Leticia Rodriguez Segura; Miguel Cruz Pérez; José Altamirano Corro; Wilfrido Paredes-Garcia; Hugo Rodríguez-Reséndiz. 2021. "Analysis of Emergency Remote Education in COVID-19 Crisis Focused on the Perception of the Teachers." Sustainability 13, no. 7: 3820.
At the onset of the crisis caused by COVID-19, the Mexican education system chose to join the global context and suspend face-to-face classes for all educational levels. For the continuity of educational processes, a transition from a traditional educational model (face-to-face) to emergency remote teaching (ERT) was made through virtual learning platforms and learning management system (LMS) schemes. Universidad del Valle de Mexico (UVM), in a collaboration agreement with Microsoft Co., chose to use Teams to continue its educational process. In this work, we intend to identify the factors that can be taken into account regarding the level of student satisfaction in the teaching–learning process in ERT using Teams, and validate the established educational strategy. Statistical analysis was carried out to analyze the academic environment for these scenario changes while considering knowledge assessment, and competencies achievement. A combined sampling method was applied with convenience and statistical analysis. The main results established significant percentages, where more than 60% of the students surveyed were manifested in the use of the teams and the organization of the class sessions by the teachers, and the activities developed. Using the Cronbach’s Alpha coefficient, the reliability of the data collection instruments was determined. The correlations of each of the survey questions were calculated to determine the relationship between themselves and the total answers, giving results similar to those obtained through data science tools. Taking advantage of the situation, data science tools were applied to compare the results with obtained values from RapidMiner software in the correlation of factors in of 0.440, 0.384, 0.246, 0.048 and 0.384.
Leticia Rodriguez-Segura; Marco Zamora-Antuñano; Juvenal Rodríguez-Reséndiz; Wilfrido Paredes-García; Antonio Altamirano-Corro; Miguel Cruz-Pérez. Teaching Challenges in COVID-19 Scenery: Teams Platform-Based Student Satisfaction Approach. Sustainability 2020, 12, 7514 .
AMA StyleLeticia Rodriguez-Segura, Marco Zamora-Antuñano, Juvenal Rodríguez-Reséndiz, Wilfrido Paredes-García, Antonio Altamirano-Corro, Miguel Cruz-Pérez. Teaching Challenges in COVID-19 Scenery: Teams Platform-Based Student Satisfaction Approach. Sustainability. 2020; 12 (18):7514.
Chicago/Turabian StyleLeticia Rodriguez-Segura; Marco Zamora-Antuñano; Juvenal Rodríguez-Reséndiz; Wilfrido Paredes-García; Antonio Altamirano-Corro; Miguel Cruz-Pérez. 2020. "Teaching Challenges in COVID-19 Scenery: Teams Platform-Based Student Satisfaction Approach." Sustainability 12, no. 18: 7514.
Decision-making based on data analysis leads to knowing market trends and anticipating risks and opportunities. These allow farmers to improve their production plan as well as their chances to get an economic success. The aim of this work was to develop a methodology for price forecasting of fruits and vegetables using Queretaro state, MX as a case study. The daily prices of several fruits and vegetables were extracted, from January 2009 to February 2019, from the National System of Market Information. Then, these prices were used to compute the weekly average price of each product and their span commercialization in Q4 and over the median of historical data. Moreover, product characterization was performed to propose a methodology for future price forecasting of multiple agricultural products within the same mathematical model and it resulted in the identification of 18 products that fit the Seasonal Auto-Regressive Integrated Moving Average (SARIMA) model. Finally, future price estimation and validation was performed to explain the product price fluctuations between weeks and it was found that the relative error for most of products modeled was less than 10%, e.g., Hass avocado (7.01%) and Saladette tomato (8.09%). The results suggest the feasibility for the implementation of systems to provide information for better decisions by Mexican farmers.
Wilfrido Jacobo Paredes-Garcia; Rosalia Virginia Ocampo-Velázquez; Irineo Torres-Pacheco; Christopher Alexis Cedillo-Jiménez. Price Forecasting and Span Commercialization Opportunities for Mexican Agricultural Products. Agronomy 2019, 9, 826 .
AMA StyleWilfrido Jacobo Paredes-Garcia, Rosalia Virginia Ocampo-Velázquez, Irineo Torres-Pacheco, Christopher Alexis Cedillo-Jiménez. Price Forecasting and Span Commercialization Opportunities for Mexican Agricultural Products. Agronomy. 2019; 9 (12):826.
Chicago/Turabian StyleWilfrido Jacobo Paredes-Garcia; Rosalia Virginia Ocampo-Velázquez; Irineo Torres-Pacheco; Christopher Alexis Cedillo-Jiménez. 2019. "Price Forecasting and Span Commercialization Opportunities for Mexican Agricultural Products." Agronomy 9, no. 12: 826.
The main focus of this research was to develop an approach using statistical tools and Data envelopment analysis (DEA) to tackling productivity measurements and benchmarking problems in electrical conductor manufacturing environment. In the present work, a tooling efficiency study was carried out with a nozzle used for the manufacture of 23-AWG wires. The efficiency of five types of tooling, four non-Mexican-manufactured types and one Mexican-manufactured type, were compared. Analysis of Variance (ANOVA) and the Tukey test were applied. Six factors were considered that influence of the performance of the tooling during the manufacturing process: productivity, quality, time, machine, operator, and color of the insulating material, but the research work focuses on the efficiency of the tooling die-nozzle. The results demonstrated that two die-nozzle models exhibited the best performance; one of them was the Mexican model, surpassed by a non-Mexican model, the capability process index Cpk = 1.26 manifested a better performance for the 3DND die-nozzle according to the statistical analysis and the tests performed. Subsequently, through a super-efficiency DEA model of inputs-oriented with non-decreasing returns to scale (NDRS). The results obtained in the statistical analysis were corroborated using this technique, its application combined with statistical tools represents an innovation for knowledge in manufacturing processes of electrical conductors. Input data were obtained at a manufacturer of electrical conductors supplier of the automotive sector in the Querétaro City of Mexico.
Marco Antonio Zamora-Antuñano; Jorge Cruz-Salinas; Juvenal Rodríguez-Reséndiz; Carlos Alberto González-Gutiérrez; Néstor Méndez-Lozano; Wilfrido Jacobo Paredes-García; José Antonio Altamirano-Corro; José Alfredo Gaytán-Díaz. Statistical Analysis and Data Envelopment Analysis to Improve the Efficiency of Manufacturing Process of Electrical Conductors. Applied Sciences 2019, 9, 3965 .
AMA StyleMarco Antonio Zamora-Antuñano, Jorge Cruz-Salinas, Juvenal Rodríguez-Reséndiz, Carlos Alberto González-Gutiérrez, Néstor Méndez-Lozano, Wilfrido Jacobo Paredes-García, José Antonio Altamirano-Corro, José Alfredo Gaytán-Díaz. Statistical Analysis and Data Envelopment Analysis to Improve the Efficiency of Manufacturing Process of Electrical Conductors. Applied Sciences. 2019; 9 (19):3965.
Chicago/Turabian StyleMarco Antonio Zamora-Antuñano; Jorge Cruz-Salinas; Juvenal Rodríguez-Reséndiz; Carlos Alberto González-Gutiérrez; Néstor Méndez-Lozano; Wilfrido Jacobo Paredes-García; José Antonio Altamirano-Corro; José Alfredo Gaytán-Díaz. 2019. "Statistical Analysis and Data Envelopment Analysis to Improve the Efficiency of Manufacturing Process of Electrical Conductors." Applied Sciences 9, no. 19: 3965.
The number and position of sEMG electrodes have been studied extensively due to the need to improve the accuracy of the classification they carry out of the intention of movement. Nevertheless, increasing the number of channels used for this classification often increases their processing time as well. This research work contributes with a comparison of the classification accuracy based on the different number of sEMG signal channels (one to four) placed in the right lower limb of healthy subjects. The analysis is performed using Mean Absolute Values, Zero Crossings, Waveform Length, and Slope Sign Changes; these characteristics comprise the feature vector. The algorithm used for the classification is the Support Vector Machine after applying a Principal Component Analysis to the features. The results show that it is possible to reach more than 90% of classification accuracy by using 4 or 3 channels. Moreover, the difference obtained with 500 and 1000 samples, with 2, 3 and 4 channels, is not higher than 5%, which means that increasing the number of channels does not guarantee 100% precision in the classification.
Diana C. Toledo-Pérez; Miguel A. Martínez-Prado; Roberto A. Gómez-Loenzo; Wilfrido J. Paredes-García; Juvenal Rodríguez-Reséndiz. A Study of Movement Classification of the Lower Limb Based on up to 4-EMG Channels. Electronics 2019, 8, 259 .
AMA StyleDiana C. Toledo-Pérez, Miguel A. Martínez-Prado, Roberto A. Gómez-Loenzo, Wilfrido J. Paredes-García, Juvenal Rodríguez-Reséndiz. A Study of Movement Classification of the Lower Limb Based on up to 4-EMG Channels. Electronics. 2019; 8 (3):259.
Chicago/Turabian StyleDiana C. Toledo-Pérez; Miguel A. Martínez-Prado; Roberto A. Gómez-Loenzo; Wilfrido J. Paredes-García; Juvenal Rodríguez-Reséndiz. 2019. "A Study of Movement Classification of the Lower Limb Based on up to 4-EMG Channels." Electronics 8, no. 3: 259.
In choice experiments the process of decision-making can be more complex than the proposed by the Multinomial Logit Model (MNL). In these scenarios, models such as the Nested Multinomial Logit Model (NMNL) are often employed to model a more complex decision-making. Understanding the decision-making process is important in some fields such as marketing. Achieving a precise estimation of the models is crucial to the understanding of this process. To do this, optimal experimental designs are required. To construct an optimal design, information matrix is key. A previous research by others has developed the expression for the information matrix of the two-level NMNL model with two nests: Alternatives nest (J alternatives) and No-Choice nest (1 alternative). In this paper, we developed the likelihood function for a two-stage NMNL model for M nests and we present the expression for the information matrix for 2 nests with any amount of alternatives in them. We also show alternative D-optimal designs for No-Choice scenarios with similar relative efficiency but with less complex alternatives which can help to obtain more reliable answers and one application of these designs.
Wilfrido Jacobo Paredes Garcia; Eduardo Castaño-Tostado. Optimal designs for estimating a choice hierarchy by a general nested multinomial logit model. Communications in Statistics - Theory and Methods 2018, 48, 5877 -5888.
AMA StyleWilfrido Jacobo Paredes Garcia, Eduardo Castaño-Tostado. Optimal designs for estimating a choice hierarchy by a general nested multinomial logit model. Communications in Statistics - Theory and Methods. 2018; 48 (23):5877-5888.
Chicago/Turabian StyleWilfrido Jacobo Paredes Garcia; Eduardo Castaño-Tostado. 2018. "Optimal designs for estimating a choice hierarchy by a general nested multinomial logit model." Communications in Statistics - Theory and Methods 48, no. 23: 5877-5888.
Lexicon-based approaches are employed despite their low performance because they can be used in many scenarios i.e. their performance is consistent despite the sentiment analysed. In these approaches, the valence of words is usually employed to determine the level of sentiment in a sentence e.g. to determine whether a tweet is positive, negative or neutral in a certain context (i.e. the tweet's polarity). In this paper, we explore the effect in the performance of lexicon-based approaches when a model like Vector Space Models (VSMs) is employed by the increment in the dimension of valence. We explored this proposal in the polarity classification of tweets in the political context in Mexico. We found that the performance is as good as with lexicon-based approaches.
Wilfrido J. Paredes-Garcia; Roberto A. Gomez-Loenzo. Polarity classification of political tweets in Mexico using a lexicon-based approach. 2018 XIV International Engineering Congress (CONIIN) 2018, 1 -7.
AMA StyleWilfrido J. Paredes-Garcia, Roberto A. Gomez-Loenzo. Polarity classification of political tweets in Mexico using a lexicon-based approach. 2018 XIV International Engineering Congress (CONIIN). 2018; ():1-7.
Chicago/Turabian StyleWilfrido J. Paredes-Garcia; Roberto A. Gomez-Loenzo. 2018. "Polarity classification of political tweets in Mexico using a lexicon-based approach." 2018 XIV International Engineering Congress (CONIIN) , no. : 1-7.
This article shows how a differential evolution algorithm can be used to find statistical designs under several optimality criteria as A, D, and T. The general algorithm of differential evolution is described and then applied on constructing optimal designs for several well-known models and compare them with those already available by other algorithms, in terms of relative efficiency. Moreover, the great effect of population size in the running of this algorithm establishes a precedent in the use of differential evolution algorithms over genetic algorithms.
Wilfrido J. Paredes-García; Eduardo Castaño-Tostado. Differential evolutionary algorithm in the construction process of optimal experimental designs. Communications in Statistics - Simulation and Computation 2017, 46, 7733 -7743.
AMA StyleWilfrido J. Paredes-García, Eduardo Castaño-Tostado. Differential evolutionary algorithm in the construction process of optimal experimental designs. Communications in Statistics - Simulation and Computation. 2017; 46 (10):7733-7743.
Chicago/Turabian StyleWilfrido J. Paredes-García; Eduardo Castaño-Tostado. 2017. "Differential evolutionary algorithm in the construction process of optimal experimental designs." Communications in Statistics - Simulation and Computation 46, no. 10: 7733-7743.