Abstract The temporal variations of solar rotation in the photosphere, chromosphere, and corona have been widely investigated, whereas transition region is rarely studied. Here, we perform a primary study about long-term variation using Ly α irradiance from 1947 February 14 to 2023 20. Correlation techniques are used, main results as follows. (1) sidereal period varies between 22.24 31.49 days,...

Many studies in the last few years have been dedicated to increasing temperatures and extreme heat Europe since second half of 20th century because their adverse effects on ecosystems resilience, human health, quality life. The present research aims analyze spatio-temporal variations events Southeastern using daily temperature data from 70 selected meteorological stations applying methodology d...

Task variation has been proposed to reduce shoulder fatigue resulting from repetitive hand-arm tasks. This review analyses the effect of task variation, both 'temporal (i.e. change of work-rest ratio)' and 'activity (i.e. job rotation)' variation, on physiological responses, endurance time (ET) and subjective feelings. Pubmed was searched and complemented with references from selected articles,...