Tuesday, June 30, 2009

Scientific Impact Measures paper by Bollen, Van de Sompel, Hagberg and Chute (PLoS ONE, 2009)

A 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. doi:10.1371/journal.pone.0006022


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.

Next-Gen User Webcast with Joan Lippincott

An archived version of the Library Journal webcast “Understanding the Next-Gen User” is now available. The event was held on June 4, 2009 and featured Joan Lippincott, CNI Associate Executive Director, as a speaker:


Monday, June 29, 2009

Lunch2.0 session on Managing Your Digital Identity

Lunch2.0 session on Managing Your Digital Identity. For those that couldn't make it or who just want to experience it again, the slidecast (slides plus audio) is now available on Slideshare, you do not need an account to view.

The slides can be accessed through the emerging technologies page on the wiki at:
or on Slideshare at: http://www.slideshare.net/dakane/digital-identity-1646360.

Thursday, June 25, 2009

OASIS Open Access Source Book Now Online

Open Access Week partner a one-stop shop for Open Access education

Washington, DC – A new portal for educational materials on the “concept, principles, advantages, approaches and means to achieving Open Access,” the Open Access Scholarly Information Sourcebook (OASIS), is now online. Launched at the recent ELPUB meeting, the new Web resource was featured at an Open Access Week Web cast today.

OASIS aims to provide an authoritative ‘sourcebook’ on Open Access. The site highlights developments and initiatives from around the world, with links to diverse additional resources and case studies. Materials are presented according to specific focus areas, to reflect diverse interest in wider access to research. OASIS focus areas highlight Researchers, Librarians, Publishers, Administrators, the Public, and Students.

About Open Access Week

Open Access Week, October 19 – 23, 2009, is an opportunity to broaden awareness and understanding of Open Access to research, including access policies from all types of research funders, within the
international higher education community and the general public. 120 campuses in 27 countries celebrated Open Access Day in 2008. Open Access Week is being organized by SPARC, the Public Library of Science, Students for FreeCulture, eIFL, OASIS, and the Open Access Directory. Promotional partners include SPARC Europe, SPARC Japan, DOAJ, OASPA, BIREME, OSI, SURF, Open-access.net, and PKP. To register
to participate in Open Access Week, or for more information, visit http://www.openaccessweek.org