Varia Vol. 82, 2019/1 - pagesPages 1 to 39Impacts of telework on the worker and his professional, family and social spheresBy Émilie VayrePages 41 to 66Normative safety and/or adaptative safety : how resilience engineering revisits activity ergonomicsBy Lucie Cuvelier, David D. WoodsPages 67 to 97From operational leeway to motor variability and diversity in MSDS preventionBy Yannick Lémonie