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The main objective of this work is to carry out a comparative analysis between the methods and provisions of the Brazilian code ABNT NBR 15421:2006 and those of the ASCE/SEI 7 and the Eurocode 8, on the seismic design of structures. The similarities and differences between these standards, as far as the application of the Equivalent Lateral Forces method (ELFM) and the Response Spectrum method (RSM) are concerned, will be addressed. The responses will be evaluated for a case study that will be modelled by the SCIA Engineer 17 software. This paper also presents some comments on the detailing of reinforced concrete structures to ensure a good performance under seismic loading, allowing for a more favourable interpretation of the seismic analysis results.

The Centralized Radio Access Network (C-RAN) architectures in the future mobile networks will have to employ, besides the optical links, the already available ethernet copper infrastructure in the connection between Base Band Units (BBU's) and Remote Radio Heads (RRH's) in order to cut implementation costs. This approach should include techniques to mitigate the crosstalk between twisted wires, which employ measurements that uses equipment at both loop ends. However, the service is stopped whenever such measurements are performed. This paper proposes a method based on linear regression to perform the most part of those measurements just from the BBU.

In a previous work, a real case of recurring bearing failures in an induction motor had been extensively studied. As a result, the cause of the problem was revealed to be the circulation of electric current through the bearings. In this way, the present paper deals with the high-frequency leakage currents in AC motors fed by PWM inverters, contextualized in the analysis of an actual case. From the parameters of an equivalent circuit in terms of cables, motor and inverter return path, a filter, characterized by a common-mode transformer, is proposed to mitigate the common-mode quantities and the correlated problem. Both simulated and experimental results show that the proposed solution represents an advantageous alternative in comparison to the traditional RC and RLC filters, since, in addition to its effect on the common-mode quantities, it dissipates a negligible amount of power.