Phase changes in a commercial AA8011 alloy from different initial microstructure conditions were studied using thermoelectric power (Δ ), differential scanning calorimetry (DSC), and transmission electron microscopy (TEM) techniques with the purpose of obtaining evidence of the interaction between recovery-precipitation and recrystallization-precipitation processes occurring during nonisothermal heating at different rates. Thermoelectric power and its thermal derivative reflect this evidence by a displacement of the characteristic precipitation peaks, the recovery and recrystallization contributions remaining masked by the strong incidence of the iron precipitation on that property, while DSC measurements detect the emergence of new peaks not observed on thermograms of homogenized samples. An exhaustive study of these peaks permits direct differentiation between precipitation and recoveryrecrystallization contributions. TEM confirms the interaction between both processes by means of local observations.

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Objectives: Health care support workers have been facing several challenges due to the stressful environment in COVID-19 pandemic. Because of the gap in literature, it is mandatory to explore their experiences to identify burnout, predisposing factors, and possible interventions. Methods: We conducted qualitative research with a hermeneutic phenomenological method. Participants belonged to cleaning services, security, and hospital administration areas at a hospital in Bogotá. We used semistructured individual interviews. The analysis approaches were deductive and inductive. Results: As main concepts, we found the following: fear of infection and coping mechanisms, dealing with COVID-19 and being part of the health care support system, overwhelming workload and motivation to keep going and socioeconomic conditions. Conclusions: We found burnout predisposing factors; however, the participants did not express symptoms of burnout syndrome. We believe protective factors such as resilience are influential concerning this outcome.