Citation Impact Factors are not the only measure of an article’s worth!

Principal Component Analysis of 39 Scientific Impact Measures

Bollen J, Van de Sompel H, Hagberg A, Chute R, 2009 A Principal Component Analysis of 39 Scientific Impact Measures. PLoS ONE 4(6): e6022.
The impact of scientific publications has traditionally been expressed in terms of citation counts. However, scientific activity has moved online over the past decade. To better capture scientific impact in the digital era, a variety of new impact measures has been proposed on the basis of social network analysis and usage log data. Here we investigate how these new measures relate to each other, and how accurately and completely they express scientific impact.
We performed a principal component analysis of the rankings produced by 39 existing and proposed measures of scholarly impact that were calculated on the basis of both citation and usage log data.
Our results indicate that the notion of scientific impact is a multi-dimensional construct that can not be adequately measured by any single indicator, although some measures are more suitable than others. The commonly used citation Impact Factor is not positioned at the core of this construct, but at its periphery, and should thus be used with caution.
Received: May 14, 2009; Accepted: May 26, 2009; Published: June 29, 2009
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Received as email to several listservs, from Gerry McKiernan (McKiernan, Gerard) [LIB] [], June 29, 2009.

IEEE Xplore now available on your mobile device

IEEE Xplore just released a beta mobile search interface. The interface provides a single search box that is easy to view on a mobile display. Searches display the top ten results with full abstracts. Useful results can be emailed for later retrieval. To start searching, point your mobile browser to

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New content partners for has added three new content partners to its free science and engineering search portal. The Association of Facilities Engineering (AFE), Society of Exploration Geophysicists (GEF), and the Institute for Computer Science, Social-Informatics and Telecommunications Engineering (ICST) will join 21 other science and engineering societies, including AIAA, ASME, IEEE, SPIA and more, in making their journal and scholarly material easily searchable via which originally offered basic keyword and advanced searching, now also offers "extras" such as RSS feeds, alert emails, a browser plug in, and a variety of widgets. This is a great free search engine to use along side or instead of Google Scholar. If you are are searching from Princeton University, look for the Find it at PUL button when you click on the link for an article. To learn more, visit or start searching here:

The announcement from this week’s Special Libraries Association Conference in Washington DC was reported by

CiteSeerX beta reaches over 1 million articles

Pennsylvania State University announced Tuesday that it’s "Scientific Literature Digital Library and Search Engine," CiteSeerX has reached over 1 million articles and other scholarly works. Focusing on literature in computer and information science, CiteSeerX allows you to do more than just search the literature. Most articles are available in fulltext via PDF or PS format. In addition, CiteSeerX provides citation information for the articles available and allows citation searching. You can search for documents, authors, and even tables. Their Autonomous Citation Indexing facilitates finding the Most Cited documents, citations, and authors, as well as creating a Venue Impact Rating.

To read Penn State’s press release click here, or click here to start searching.