List of selected web contexts, and relative WICs used to perform searches.

<p>The last two columns differentiate the following typologies of indicators: R = relational; D = dynamic; G = global level; N = national level; C = specific cultural contexts.</p

Radar graphs of 7 selected keywords according to the following web-profile indicators: WOS.09–10%; WOS.V1; WOS.V2; WGY.en%; WGB.en%; WGT.us.V1 (see <b>Table 2</b> for labels).

<p>The interpretation criteria are: (c1) relevance in the scientific context; (c2) current relevance in the world; (c3) relevance in the individual sphere; (c4) emerging and stabilised trends of dynamic variation. For each WIC, relative percent values over the total of 24 keywords are reported.</p

Conceptual model of the proposed approach.

<p>The meta-knowledge area, where scientific knowledge is combined with general knowledge (at the top) is the basis of decisions that produce impacts on the environment (in the centre), which in turn contribute to systems evolution (at the bottom). This process produces new scientific knowledge.</p

Type of dynamic index (<i>DI</i>) and relative WICs.

<p>See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0042128#pone-0042128-t002" target="_blank">Table 2</a> for labels. Different interpretations of the “recent times” and “former times” concepts offer an evaluation of emerging trends and stabilised trends of keywords occurrences.</p

Results of the relational indices (<i>RI</i>) and dynamic indices (<i>DI</i>) (See Tables 3 and 4 for labels and indices structure).

<p><a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0042128#s3" target="_blank">Results</a> of the relational indices (<i>RI</i>) and dynamic indices (<i>DI</i>) (See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0042128#pone-0042128-t003" target="_blank">Tables 3</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0042128#pone-0042128-t004" target="_blank">4</a> for labels and indices structure).</p

Types of temporal trends obtained from the year-by-year searches in the Web of Science databases: results for 6 selected keywords.

<p>Data are expressed as ratio over the maximum value, achieved in the year 2010.</p

List of selected keywords for web profile identification.

<p>List of selected keywords for web profile identification.</p