EMF exposure assessment through an online application: time and frequency domain data acquisition and processing

WebNir (https://webnir.eu) [1] is an open-access web platform that exposes several applications related to the assessment of risk from exposure to electromagnetic fields (EMF) are made available. This platform is developed by the "Nello Carrara" Applied Physics Institute of the National Research Council (IFAC-CNR) within the framework of a research project financed by INAIL (Italian Workers Compensation Authority). This paper describes the application that allows the automated processing of measurements produced by various instrumental chains operating in the time or frequency domain. The goal of these automated procedures is to perform the verification of compliance with exposure values, the calculation of various radiological protection indices and the graphical display of the source data and processing results. Initially, the procedure refers to the most common measuring instruments, implementing specific scanning algorithms for each. Then, this approach was extended to accept more generical measurement results, potentially produced by any measurement chain, as long as they are in open format (text file or spreadsheet). In particular, for data files whose structure is unknown to the system, the user provides the import procedure with the parameters necessary for its correct interpretation. The application also allows the calculation and representation of quantities not made available by the considered measurement chain (e.g., exposure indices, $\Delta \mathrm{B} /3\mathrm{s}$ variation).