Existing literature has paid little attention to the role that motivational variables have on the academic performance of mathematics students in Peru. The objective of the study was to determine the relationship between motivation and its dimensions and academic performance in this subject. A cross-sectional and correlational study was carried out in a sample of 251 first-cycle Peruvian undergraduate mathematics students using an electronic questionnaire. The students’ academic performance was measured by their records of the Mathematics course. The motivation was assessed using a self-report instrument designed to assess students’ intrinsic motivation, extrinsic motivation, and demotivation through 28 items. For statistical processing, Spearman’s Rho coefficient and a linear regression analysis were taken into account. It was concluded that there is a weak correlation between academic performance and motivation (r = 0.222, p = 0.001 ), in the same way as intrinsic motivation (r = 0.242, p = 0.001 ) and extrinsic (r = 0.117, p = 0.003 ) and a weak correlation with the demotivation dimension (r = 0.142, p = 0.024 ). With regard to linear regression, all dimensions of motivation were predictive of academic performance; intrinsic motivation explains a 27.2% of academic performance (β = 0.732; p = 0.011 ); extrinsic motivation explains a 16.8% of academic performance (β = 0.556; p = 0.001 ), and demotivation a 12.4% (β = 0.427; p = 0.008 ). This research provides a clear contribution with results on the association between motivation and academic performance in mathematics. This study suggests that universities, teachers, and students’ families take the necessary measures and provide stimulation to increase their motivation. In the same way, it is suggested that the university, in general, implements strategies to involve the student so that the student is always clear about the reason why they are at university and finish the degree they have started.

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A través de esta investigación se busca realizar el estudio y caracterización de un filtro pasivo de distorsión armónica aplicado a la protección de una SS.EE de distribución ubicada al interior de una planta de manufactura, teniendo por propósito principal su diseño en base a los parámetros internos del transformador, como su reactancia capacitiva e inductiva, y la optimización del filtro mediante el método heurístico tipo enjambre de partículas llamado algoritmo de forraje bacterial. El filtro pasivo utiliza la propia capacitancia del transformador y una externa para sintonizar la banda de rechazo en el intervalo de frecuencias de las corrientes armónicas. Para validar esta condición se utiliza el equipo CPC 100Omicrom, que permite obtener las medidas de tangente delta. De esta manera, el objetivo de este filtro pasivo incorporado es lograr condiciones de trabajo adecuadas y mejoradas atendiendo a las necesidades de proteger tanto el transformador como la maquinaria de planta a la que brinda suministro, especialmente en circunstancias críticas en que los armónicos presentes en la red son altamente agresivos.

RESUMENEl presente trabajo estudia la productividad de la soldadura en construcción naval, partiendo de un análisis de la producción en nuestro medio pasando a presentar algunas técnicas o alternativas para incrementar la productividad de la soldadura en construcción naval. ABSTRACTThe present work studies the productivity of the weld in naval construction, starting off of an analysis of the production in our means happening to present some techniques or alternatives to increase the productivity of the weld in naval construction. We will begin describing some basic knowledge of weld, productivity and like determining the productivity of weld in the naval construction, in addition to because of the analysis of the productivity of the weld in our means. Also some factors are exposed that are going to influence in the production of the weld, as they are the yield by fusion, the selection of the materials, the type of steel, the type of procedure, etc. On the other hand, the statistical data taken in the zone from work appear that will serve to measure the productivity of the weld based on the kilograms of deposited metal and the yield by fusion of several types of electrodes. Finally, the proposal appears to increase the productivity of the weld in our means on the basis of the observed problems and the made calculations, presenting in addition two welding procedures that can be applied in our means, and a method that will facilitate the solution of the problems that are detected in the shipyard.