This study presents the estimation of the electric and magnetic fields level inside a 400 MVA electrical substation. Located in the northeast region of Brazil, the power plant operates with 230 and 69 kV at 60 Hz frequency. The on-site measurements were performed at previously selected locations covering the whole courtyard and followed the international and national regulatory standards. The electrical and magnetic fields 2-D contour maps over the entire courtyard are presented, which allow better visualisation and analysis of the exposure levels around all equipment. By using the GoldenSurfer V.13 tool, eight interpolation methods were applied to predict unsampled locations. The plots were made using the method that best fit the sampled dataset after the cross-validation technique is used. The measurements were taken during six days during a period of 16 h on 741 locations. For this electrical substation, the maps validate the high electric field level close to breakers and switches at 230 kV and high magnetic field close to equipment operating at 69 kV. The comparison between the exposure levels and those established in current guidelines indicate that the electromagnetic environment on this substation is safe for the occupational population as well as for the general public.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
This work presents a review of motion and time made in the most performed service in a small beauty salon in Mossoró - RN - Brazil. Thus, this research aims to use the knowledge derived from the engineering of methods, precisely, the studies movements and times and to associate such studies, which were developed mainly within the manufacturing process, to bring to a service delivery environment. To have specific objectives, to prepare a flowchart of the operation of the manicure service, to find the standard time of this service through the chronoanalysis of the stages of the task and to carry out the study of the methods developed during the execution of the service in question. In this sense, it can conclude that employing the chrono-analysis tool, the default time for the chosen operation is approximately 36 minutes. This finding means that this is the period required to provide a unit of the manicure service, considering the skills, efforts, conditions, and consistencies of the operator, the physical environment, the materials, and equipment analyzed. This work presents a study of motion and time in the most performed service in a small beauty salon in the city of Mossoró/RN, in Brazil.
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