A body of work referred to as the "life course" framework (also known as "life course theory," the "life course paradigm," and the "life course perspective") has been increasingly used to motivate and justify the examination of the relationships among variables in social and behavioral science, particularly in the study of population health and aging. Yet, there is very little agreement on what...

There is still no consensus definition of complex systems. This article explores, as a heuristic approach, the possibility of using notions associated with life as transversal concepts for defining complex systems. This approach is developed within a general classification of systems, with complex systems considered as a general ‘living things’ category and living organisms as a specialised cla...

The about a hundred central concepts related to research in the global quality of life can, in a holistic medical frame of interpretation, be organized under ten abstract key concepts: existence, creation of the world, state of being, daily living, talents, relations, sex, health, personal development, and therapy with subthemes as discussed in this paper. The paper shows that the concepts in e...