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map.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>well-formed.eigenfactor.org : Map</title>
<meta property="og:image" content="http://well-formed.eigenfactor.org/img/map.png" />
<meta name="description" content="Information-aesthetic explorations of emerging patterns in scientific citation networks. A cooperation between the Eigenfactor® Project (data analysis) and Moritz Stefaner (visualization).">
<link rel="stylesheet" type="text/css" href="common.css">
</head>
<body>
<div class="header">
<div id="cHeader_navigation">
<a href="//eigenfactor.org"> Home </a> >
<a href="//eigenfactor.org/projects.php"> Projects </a> >
<a href="//eigenfactor.org/projects/researchArea_2.php"> Mapping Science</a>
</div>
<h1>
<a href="./">well-formed . eigenfactor</a>
</h1>
<ul class="menu">
<li>
<a href="./">
<span>Home</span>
</a>
</li>
<li>
<a href="radial.html">
<span>Citation patterns</span>
</a>
</li>
<li>
<a href="time.html">
<span>Change over time</span>
</a>
</li>
<li>
<a href="treemap.html">
<span>Clustering</span>
</a>
</li>
<li>
<a class="active" href="map.html">
<span>Map</span>
</a>
</li>
</ul>
</div>
<div class="content grid">
<p class="info-text-1">
<strong>Visualization</strong>
This map visualization puts journals, which frequently cite each other, closer together. You can drag the white magnification
lens around to enlarge a part of the map for closer inspection. Clicking one of the nodes will highlight all its connections.
If a journal is selected, the node sizes represent the relative amount of citation flow (incoming and outgoing) with respect
to the selection; otherwise, they are scaled by their Eigenfactor™ Score. The map coordinates were calculated using
<a href="http://cytoscape.org/">Cytoscape</a>.
</p>
<p class="info-text-2">
<strong>Data set</strong>
We use a subset of the citation data from
<a href="http://www.thomsonreuters.com/products_services/scientific/Journal_Citation_Reports">Thomson Reuters' Journal Citation Reports</a> 1997–2005. The complete data aggregate, at the journal level, approximately
60,000,000 citations from more than 7000 journals over the past decade. For an interesting subset, we select journals
ordered by their
<a href="http://www.eigenfactor.org/methods.htm">Article Influence™</a> in 2005, but include no more than 25 journals from a single field. To make the subset coherent,
we make sure that selected journals are included all years and that we cover the 10 journals with highest
<a href="http://www.eigenfactor.org/methods.htm">Eigenfactor</a>™ score. To cluster the networks, we use the information-theoretic method presented in
<a href="http://arxiv.org/abs/0707.0609">Maps of information flow reveal community structure in complex networks</a> (
<a href="http://dx.doi.org/10.1073/pnas.0706851105">PNAS 105, 1118 (2008)</a>), which can reveal regularities of information flow across directed and weighted networks.
</p>
<iframe class="vis" src="map_vis.html" scrolling="no"></iframe>
</div>
</body>
</html>