In 2011, the journal was acquired by Hindawi Publishing Corporation and converted to open access and to a model without an editor-in-chief.

[1] Each domain had its own set of principal and associate editors, as well as an editorial board.

[3] Published articles could be assigned to multiple, different domains, so that an article on, for example, air particulates could be found easily both by researchers working in environmental or Earth sciences and biomedical researchers searching for causes of asthma.

[4] After the journal was taken over by Hindawi, it was reorganized according to a more traditional model with more rigid subject sections.

However, the journal has no formal editor-in-chief any more and decisions regarding acceptance or rejection of a manuscript appear to be made by majority vote from a mix of external reviewers and editors (whose identity remains confidential unless a manuscript is accepted for publication).