Talking about quality and educational excellence within any higher level institution represents continually improving in each of its areas, which is why the constant analysis and self-evaluation of the services provided within it are increasingly important, these are carried carried out in order to locate areas in which it is necessary to implement strategies that help achieve the desired quality levels. This research work is an analysis study carried out on the services provided by the Computer Laboratory to users of the Faculty of Mechanical and Electrical Engineering of the Universidad Veracruzana in Poza Rica Veracruz, Mexico, using an opinion survey applied to A sample of 100 people (students and academics) which allows to identify the indices of each of the services that are provided in it, the results obtained provide relevant data that will later serve to design an improvement plan that allows generating actions that favor to continue being a quality educational institution.

The Finite Difference in Time Domain (FDTD) method is currently one of the most used electromagnetism methods in electromagnetic field simulation, however, in order to obtain reliable results from this simulation it is necessary to have optimal boundary conditions. Perfectly Coupled Layers (PML) is characterized by the decomposition of the transversal field to the direction of propagation in its rectangular projections, and the use of both electrical and magnetic conductivity in the numerical layers for the absorption of electromagnetic fields. The PML layers are characterized by values of permittivity, permeability and conductivity that are assigned to each of the equations according to their position in the region. Because it is the same set of equations there is no need to use connection conditions at the junction of the analysis region with the PML absorption region, which provides a natural transition throughout the region. This paper presents the study of the difference between the calculation region with and without PML layers.

Lighting is a fundamental part in the ergonomic conditioning of workstations; Although, the human being has the ability to adapt to different light conditions, the deficiency in it causes visual fatigue, which can be one of the causes for which workers make mistakes in their activities or even to cause accidents. The present work focuses on an analysis of the lighting conditions in the classrooms, laboratories and cubicles of the faculty of Mechanical and Electrical Engineering, and identify yes, the areas where the visual tasks associated with the workstations have poor lighting or excessive that causes glare, to determine what preventive or corrective measures to take, in order to achieve a safe and healthy environment for the university community. With the help of a luxometer measurements are made to calculate the average illumination (EP) and compare it with the Official Mexican Standard "NOM-025-STPS-2008, Conditions of lighting in the workplace" that establishes the maximum permissible limits ( 500 luxes). The results obtained reflect that not all the mentioned areas comply with NOM-025-STPS-2008.

In the present work, an analysis was carried out to know the wear modes present in connecting rod bearings from internal combustion engines. These mechanical elements were selected since they are exposed to different engineering failures such as incorrect assembly, severe loads, extreme temperatures, inadequate conditions, and loss of lubricity. In this particular case, the bearings that were selected had a service life of approximately 8 years. Different techniques such as SEM and optical microscopy, EDS analysis, hardness testing, and surface profilometry were used to characterize the unworn and worn bearings. Wear mechanisms such as sliding wear (scoring), fatigue wear with cracks where torn out material was clearly observed, discoloration areas, and two-and three-body abrasion wear (rubbing marks) were identified on the bearing surfaces.