Dielectric Performance of Biodegradable Ester Insulating Oils Under High-Voltage Transient Stress: A Study Based on Partial Discharge Measurements

The search for sustainable solutions in the electrical sector has driven the use of biodegradable insulating fluids, such as esters, as alternatives to petroleum-derived mineral oils. This study experimentally evaluates the dielectric performance of two esters (one natural and one synthetic) under high-voltage transient stresses that simulate lightning strikes. A total of 40 standard lightning impulses (± 5 0 ~ k Vpeak) were applied to a prototype with an insulation system impregnated with ea...

An Analysis of Aptness and Comfort in Healthcare Units and Patient Safety in the Scope of Occupational Health and Safety

Through data collected from the Portuguese National System of Health Quality Assessment (SINAS) for the dimensions Patient Safety and Aptness and Comfort in Healthcare Units a comparison was established between quality evaluation issues in Portuguese healthcare units and how these issues could affect healthcare workers' health and safety, at the same time is presented a methodology that enables to rank healthcare units for the dimension Patient Safety. The methodology proposed shows that, glo...

A SEGURANÇA E SAÚDE NA CONSTRUÇÃO: BREVE ANÁLISE DA SITUAÇÃO EM MOÇAMBIQUE

Heavy metal exposure in landfill leachate treatment facilities