Recently, it was hypothesized that acute or cumulative suppression of non-REM sleep intensity might be related to the therapeutic effects of antidepressants. This intensity has been proposed to be expressed in the EEG power density in non-REM sleep. In the present study, the relationship was examined between the changes of EEG power density in non-REM sleep and the changes in clinical state in ...

A Two-Levelled Ontology In The Construction of Social Reality, John Searle argues for a two-level ontology along the following lines. Facts on the lower level – which he calls brute facts – can exist independently of human beings and their institutions. Facts on the upper level, which he calls institutional facts, depend on human institutions and above all on an associated ‘collective intention...