Now showing items 1-5 of 9218

    • Motivación y aprendizaje en MOOC con innovación educativa para formar en sustentabilidad energética

      Carrera López, Jeimmy del Carmen; 498171
      La presente investigación analiza la motivación y el aprendizaje de los participantes (alumnos) en cuatro cursos online masivos y abiertos (MOOC). Estos cursos tienen innovación educativa para formar a la comunidad en general en sustentabilidad energética. Estos MOOC se impartieron durante el año 2017. La investigación forma parte del sub-proyecto: “Innovación abierta, interdisciplinaria y colaborativa para formar en sustentabilidad energética a través de MOOC”, que se ofertaron en el portal del Laboratorio Binacional para la Gestión Inteligente de la Sustentabilidad Energética y la Formación Tecnológica (https://energialab.tec.mx/es ). La pregunta que conduce la siguiente investigación es: ¿Cuál es el aprendizaje y la motivación que perciben los participantes de los MOOC con innovación educativa para formar en sustentabilidad energética? De esta manera, el objetivo fue conocer la motivación y el aprendizaje que perciben participantes de MOOC que forman en el tema de sustentabilidad energética y que se diseñaron con innovación educativa en diferentes aspectos, tales como: inclusión de estrategias didácticas innovadoras: aula invertida, aprendizaje basado en retos y gamificación. Se utilizó un estudio exploratorio bajo un enfoque cuantitativo. Los resultados obtenidos muestran algunas ventajas que se pueden obtener al matricularse en los MOOC que integran herramientas innovadoras en su diseño y, el impacto colateral en el desarrollo de habilidades y destrezas digitales; por mencionar algunos, como: el autoaprendizaje, el aprendizaje colaborativo y desarrollo de habilidades informáticas e informacionales.
    • Fantasticidad, encuentros con lo monstruoso e identidades inestables en dos novelas mexicanas: Patricia Laurent Kullick y Guadalupe Nettel

      Zermeño Vargas, Carlos Gerardo
      Este trabajo explora desde tres vertientes, lo fantástico, los estudios sobre lo monstruoso y la identidad, dos novelas mexicanas escritas por mujeres y publicadas en los primeros años del siglo XXI: El camino de Santiago, de Patricia Laurent Kullick y El huésped, de Guadalupe Nettel. Se ofrece una propuesta analítica sobre lo fantástico que vincula las teorías latinoamericanas con los estudios norteamericanos sobre la ficción, postulando un marco interpretativo sistémico, donde los hechos imposibles tienen repercusiones en el mundo representado en la obra, particularmente en cuanto a la identidad que ostentan los protagonistas. Así, y para ofrecer una propuesta alternativa a las corrientes de estudios de lo fantástico que ve en ciertos temas la "pérdida de la identidad", se plantea la "identificación con lo monstruoso" como el motor principal de un proceso de construcción y reconstrucción del yo.
    • Control charts for autocorrelated processes under parameter estimation

      Garza Venegas, Jorge Arturo
      Statistical Processes Monitoring is a collection of statistical-based methodologies and methods for monitoring the quality of manufactured products or services. Within these tools, control charts are powerful ones to assist practitioners on the detection of departures from in-control situations as long as the assumptions made on their design are fulfilled; otherwise, their power might decrease. For instance, control charts performance has been shown to be negatively affected when using estimated parameters (in which case the Average Run Length, ARL, becomes a random variable) or when dealing with autocorrelated data. Given that, this research is focused on the effect of parameter estimation on the performance of the X-bar and the modified S^2 control charts for monitoring the mean and the variance, respectively, of autocorrelated processes under parameter estimation. The average of the ARL and its standard deviation are considered as performance measures as they take into account the sampling variability of the ARL. Furthermore, a bootstrapping methodology is applied to adjust control limits in order to have a guaranteed conditional in-control performance with a certain probability and the effect on the out-of-control ARL is also studied.
    • Relationship between physical and acoustical parameters for road surface characterization

      Leos Suárez, Jesús Rodrigo
      An acoustic system for automated road surface conditions detection from acoustic signals of surface interaction is introduced. The aim of this work is to obtain different characteristics of the roadway surface by which the vehicle is circulating, to analyze its texture, friction and other characteristics related to the road surface with anticipation so that this information could be used in future automotive safety applications. The advantages of using an acoustic device compared with other current technologies is the low cost of the equipment and its portability. The robustness of our approach is evaluated on audio that span an extensive range of vehicle speeds, noises from the environment, road surface types, and pavement conditions including international friction index (IFI) values from 0 km/hr to 100 km/hr. The training and evaluation of the model were performed on different roads to minimize the impact of environment and other external factors on the accuracy of the classification. The results showed that there is a correlation between what we measured with the mechanical systems and what we obtained as a reply from the acoustic system. The hypothesis is that with the application of an acoustic device that characterizes the pavement in real time, future automotive applications such as adjusting the ABS system automatically in an optimal range of braking, showing a warning indicator light on the dashboard, or improving the driving decision making of autonomous cars will be possible by having prior information of the slippery surface conditions in which the vehicle transits.
    • Effects of sound on growth, viability, protein production yield and gene expression in Escherichia coli.

      Acuña González, Edgar
      The effect of sound on biological systems is a subject that has been previously explored, mainly in relation to its use to increase agricultural production. However, the potential of this phenomenon has not been exploited properly because present studies have focused only on one or two sound elements for the characterization of their biological effects. In this sense, the effects of other sound wave elements have been overlooked. In the present work, the effects of frequency, amplitude, duration, intermittence and pulse - individually and in combination - were characterized in Escherichia coli through the measurement of its biomass, viability and yield production of recombinant protein. The treatments of frequency and duration increased the concentration of biomass in 19% and 44% respectively at time 24 h; however, high variability was observed in both treatments. The amplitude treatment had a significant effect on the viability, which the duration of the exponential phase was doubled. The intermittency treatment increased the yield of recombinant protein 1.5 times without significant contribution of the other sound elements. Based on this observation, the effect that intermittency could have on the upregulation of the expression of genes involved in the production of recombinant proteins was investigated. The RNA of three candidate genes (BarA, CheA and CpxR) was quantified in the presence of an intermittent sound. All genes were upregulated (1.38, 2.66 and 1.33 times respectively); however, only upregulation related to chemotaxis (CheA) was statistically significant. Finally, an omnidirectional sound source was adapted to small-volume commercial bioreactors to characterize the distribution of sound within the container. It was determined that the implementation of sound induction in a commercial bioreactor is feasible, although limited to certain specific frequencies close to 500 and 1000 Hz. The integral nature of this characterization presents a deeper understanding of bacterial systems and also offers a way through which it is possible to explore its application for industrial purposes.