Average Authorship from 1946–2013 by Publication Language.

<p>* Trendline for Italian language journals was not included due to data being available for only 2 publication years.</p

Mean Number of Authors/Article from 1946–2013 by Publication Type.

<p>This graph shows the mean number of authors/article for the three publication types analyzed: 1) Case Reports, 2) Reviews and 3) Original Research.</p

Per Journal Demographics and Linear Regression Analysis of Authorship over Time.

<p>Data collected per journal (Starting year in which data was collected on MEDLINE, total # of articles analyzed, total # of authors analyzed, mean number of authors/article for all years included per journal). Linear regression analysis of the relationship between mean number of authors/article per journal and time. See <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0139005#pone.0139005.s001" target="_blank">S1 Table</a> for full journal names. Explicit endorsement of ICJME guidelines on each journal’s website was determined. 1) Explicitly endorses ICMJE. 2) Does not explicitly endorse ICMJE but has a statement regarding authorship criteria in their instructions for authors. 3) Has no mention of ICJME or authorship contributions.</p

Relationship between Impact Factor and Average Authorship in 2013.

<p>The 2013 impact factor of journals analyzed compared against the average number of authors/article in 2013. <i>JBR-TBR</i> and <i>Journal of Radiology Case Reports</i> were excluded from this graph as they did not have a 2013 impact factor.</p

Overall mean number of authors/article for all included journals from 1946 to 2013.

<p>Analysis of mean authorship trends over time for radiology journals from 1946 to 2013. Time points for the implementation and major revisions to ICJME guidelines in 1979, 1997, 2003, 2010 and 2013 are denoted by red arrows.</p

Per Publication Language Linear Regression Analysis of Change of Authorship over Time.

<p>Per Publication Language Linear Regression Analysis of Change of Authorship over Time.</p

Mean Number of Authors/Article and Change of Authorship per Journal.

<p>This is a double axis bar chart showing the mean number of authors/article per journal and the overall change in authorship per journal over time. Journals were organized by change in authorship over time. All journals show an increase in the change in authorship over time with the exception of the <i>Korean Journal of Radiology</i> which has a -0.003 change of authorship per year.</p

Suppression of Radiative Damping and Enhancement of Second Harmonic Generation in Bull’s Eye Nanoresonators

We report a drastic increase of the damping time of plasmonic eigenmodes in resonant bull’s eye (BE) nanoresonators to more than 35 fs. This is achieved by tailoring the groove depth of the resonator and by coupling the confined plasmonic field in the aperture to an extended resonator mode such that spatial coherence is preserved over distances of more than 10 μm. Experimentally, this is demonstrated by probing the plasmon dynamics at the field level using broadband spectral interferometry. The nanoresonator allows us to efficiently concentrate the incident field inside the central aperture of the BE and to tailor its local optical nonlinearity by varying the aperture geometry. By replacing the central circular hole with an annular ring structure, we obtain 50-times higher second harmonic generation efficiency, allowing us to demonstrate the efficient concentration of long-lived plasmonic modes inside nanoapertures by interferometric frequency-resolved autocorrelation. Such a light concentration in a nanoresonator with high quality factor has high potential for sensing and coherent control of light-matter interactions on the nanoscale