This paper proposes the design of a quasi-experimental time-series model comprising lean manufacturing tools—such as the value stream mapping and 5S’s—with the aim of reducing the level of waste and losses in a micro-company dedicated to the production of Alpaca wool clothing in Junín, Perú. The model implementation managed to reduce the level of waste by 7%, increase the efficiency in material consumption, and reduce the cycle time and total supply time. The implementation of the model allowed reducing the level of waste in the production process and creating an organizational culture based on order, cleanliness, discipline, and teamwork.

RESUMEN:En este trabajo se dan a conocer algunas de las actuaciones que un equipo del Departamento de Ingeniería Mecánica de la Universidad de La Rioja desarrolla a modo de especificación de diseño conceptual del método formativo. Constituye una propuesta de implantación, que incluirá un plan de alcance, de comunicación y de riesgos, de cara a proponer a los usuarios de la Universidad un método alternativo y algo más acorde con las tendencias europeas que en este sentido se van produciendo desde hace ya algunos años. La aproximación seleccionada para la propuesta de implantación es la basada en la metodología PBLE (Project Based Learning Engineering).ABSTRACT: This work presents some of the actions that a team of the Mechanical Engineering Department of the University of La Rioja develops as conceptual design specification of the formative method. It is a proposal of implantation, which will include a plan of communication and risks, to propose to the University users an alternative method in agreement with the European tendencies that go away in this sense during last years. The selected approximation for the proposal of implantation is based in the PBLE (Project Based Learning Engineering) methodology.PALABRAS CLAVE: Aprendizaje, innovación docente, docencia de la ingeniería, PBL, PBLE.

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The purpose of this study was to analyze the behavior of a lumbar spine disc prosthesis with different materials. The study was performed at L4-L5 lumbar motion segment using the finite element method (FEM). A healthy Finite Element (FE) model was used as a reference with which to compare the results of the FE simulations of the artificial discs. The healthy and the artificial FE models were subjected to a combination of 0.5 MPa Compression pre-load and 10Nm of Flexion moment. The artificial FE models were based on Maverick artificial disc, and the three materials proposed for study the artificial disk were Titanium, Ceramic and CrCoMo alloy. The most suitable material for developed the artificial disc was the CoCrMo alloy due to: The von Mises stresses on the bone with which this artificial disc was in contact were reduced as much as possible and also, were very similar to the von Mises stresses obtained in the bones from the healthy disc.