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- Implementation of BIM methodologies in construction supervision: application to the case study of the rehabilitation of skylights in the civil pavilion of Instituto Superior TécnicoPublication . Varandas, Leonardo Alexandre MarquesBuilding Information Modeling (BIM) is an increasingly used methodology in the construction industry. It is common knowledge that BIM has great advantages in the design phase, in the coordination of the different specialties and scheduling, and, in the management of buildings, facilitating the management of assets and the planning of maintenance actions. The challenge arose of verifying whether it would be advantageous to use this methodology in the supervision of works, a very important and fundamental step during the construction phase that guarantees the compliance of the project. In this follow-up, the rehabilitation of the skylights of the Civil Pavilion of Instituto Superior Técnico (DECivil) was monitored. The inspection data was collected, which was inserted into the BIM methodology, and then the possible advantages and disadvantages of this methodology in the inspection of works were analyzed.
- Power quality in Air Force radar stationsPublication . Costa, HugoPower quality continues to be a major con-cern, both for suppliers and consumers. These need the correct operation (and durability) of their electrical and electronic equipment. It is essential for customers who consume a huge amount of power, such as hospitals and the industry for example, to have a continuous and correct performance of their equipment. The Air Force Radar stations aim at addressing the correct performance of all installed equipment, due to the permanent need to control and supervise the national airspace. Therefore, generator sets and battery banks con-nected to UPS were installed in each of the Radar Stations in order to ensure the correct operation of the whole unit, during a network fault (mainly in the case of voltage sags and power supply interruptions). Currently the expected life time of the battery bank is considerably less than the manufacturer’s expectations. This studywas carried out to monitor the power quality in three Radar Stations, in order to analyse if the problem of batteries would be related to the quality of electric power supplied to the Radar Stations. To this end, a 3-month monitoringwas carried out and an analysiswas made of the UPS’s functioning if his configuration had been in accor-dance with the tolerance curves of the possible immunity classes of the equipment. Lastly, it was concluded that the results do not confirm the initial theory.