The objective of this study was to compare the levels of optimal experiences (OE) that adolescents report in different activities of the school and out-of-school context and to analyze how these levels are related to self-concept and self- esteem in the adolescent population at Autonomous City of Buenos Aires, Argentina (ACBA-AR). For this purpose, the OE Brief Inventory and the Self-Perception Profile were administered to 399 adolescents attending ACBA-AR high schools. We performed an ANOVA with repeated measures with intrasubject main effect to compare the OEs in each activity and a correlation analysis to study the relationship between OE and self-concept and self-esteem. Among the results, we found that adolescents experience higher levels of occurrence of OE in extracurricular activities. With regard to self-concept and self-esteem, the relationships found were in all cases positive...

La presente investigación tiene como objetivo central mejorar la eficiencia del proceso productivo de snacks fritos en una empresa productora y distribuidora de snacks en la ciudad de Arequipa, mediante la aplicación de herramientas de Lean Manufacturing. Inicialmente se realizó un análisis de la situación actual donde las causas raíces que provocan la baja eficiencia en el proceso productivo son: la falta de mantenimiento con enfoque preventivo, mala distribución de planta, falta de tiempos fijados e indicaciones claras para normalizar los procesos, falta de inspección y mantenimiento a las máquinas y/o equipos, no se promueve el orden en el trabajo, falta de un buen control en las ordenes de pedido y no se evalúan a los proveedores de MP. Ante ello, en la presente tesis se propuso la implementación de herramientas de Lean Manufacturing que harán frente a estas causas, logra...

Background: Mechanical reasoning (MR) is the ability to identify the components of a system and understand how they interact in order for the system to work. Different mechanical systems, such as those of wheels and gears, require different types of reasoning. Objective: This study seeks to analyze the relationship that working memory (WM) and processing speed (PS) have with MR. Method: One hundred seventy-three (173) university students were assessed through the DAT test which consisted of 30 MR problems, the symbol search subtest of the WAIS-III battery for assessing the PS, and the BIMET-V and BIMET-VE batteries to evaluate the WM verbal and visuospatial components. Results: Regression analyses showed that the proposed variables do not predict the performance in gear problems, while the visuospatial WM and the PS predict the performance in wheel problems. Discussion: The results sugge...