28 April 2004Second Nordic Conference on Scholarly Communication 1 Citation Analysis for the Free, Online Literature Tim Brody Intelligence, Agents, Multimedia Group University of Southampton

28 April 2004Second Nordic Conference on Scholarly Communication 2 Content Current services for Open Access Literature Institutional Archives Registry Metadata Harvesting through Celestial Citebase Search –Citation Linking –Search and Navigation Service Web Impact as a predictor of Citation Impact

28 April 2004Second Nordic Conference on Scholarly Communication 3 Institutional Archives Registry

28 April 2004Second Nordic Conference on Scholarly Communication 4

28 April 2004Second Nordic Conference on Scholarly Communication 5 Sites in the IAR Things we want to know: –GNU EPrints sites –Other research collections (Other Archives, Open Journals) –BOAI 1. vs BOAI 2. A submission form consisting of: –URL, Name, OAI URL, Country, type, full-text, software Cant (yet) track full-texts (Create a master-list so archives only register- once?)

28 April 2004Second Nordic Conference on Scholarly Communication 6 Celestial Designed to: –Be an abstraction over OAI-PMH versions –Caching OAI metadata records Technological questions: –How big can the OAI-PMH go (ok for 5 million records so far) –How reliable are OAI-PMH implementations Feeds Citebase, IAR, some external users

28 April 2004Second Nordic Conference on Scholarly Communication 7

28 April 2004Second Nordic Conference on Scholarly Communication 8

28 April 2004Second Nordic Conference on Scholarly Communication 9 Services for Open Access Literature Self-Archived Full-texts (Pre/Post-prints) Open Access Publishing Citation Analysis/Linking Services (Citebase / Citeseer / OpenURL / DOI) Version Linking Services Search Engines Navigation Tools Analysis & Assessment Citebase Citeseer Google BMC arXiv.org OAI-PMH Transport OAIster Scirus n.b. Scirus/OAIster arent citation-analysis aware yet, Google indexes Citeseer. Not an exhaustive list …

28 April 2004Second Nordic Conference on Scholarly Communication 10 Citation Analysis & Linking A citation is a reference from one work to another [as a hyperlink: a citation link] Citation analysis uses citation relationships to analyse patterns in research As a graph a work (paper, book etc.) is a vertex and a citation an edge Bibliometrics –(study of patterns in literature)

28 April 2004Second Nordic Conference on Scholarly Communication 11 Digitometric/Infometric Analysis Bibliometrics for the online age Couple citation analysis with Web analysis –(how many times has x been accessed?) Similar to readership studies, but easier to survey and more comprehensive –(though subject to the same problems of copies being re-distributed, multiple accesses etc.)

28 April 2004Second Nordic Conference on Scholarly Communication 12 Citebase Search

28 April 2004Second Nordic Conference on Scholarly Communication 13 Citation Linking Retrieve and cache full-texts –LaTeX, PDF, XML Extract reference list Extract individual references Parse references into components –Author, year, title, journal, volume, pagination Store in structured database

28 April 2004Second Nordic Conference on Scholarly Communication 14 Citebase Search

28 April 2004Second Nordic Conference on Scholarly Communication 15

28 April 2004Second Nordic Conference on Scholarly Communication 16 Citebase Search: Navigation by Citation Links Current Article Co-cited Article with reference list Reference link Future Past Related

28 April 2004Second Nordic Conference on Scholarly Communication 17

28 April 2004Second Nordic Conference on Scholarly Communication 18 Predicting Citation Impact The Web gives us access to new metrics –Download/access frequency Can early-day download frequency give an indication of longer-term citation frequency? (Web logs from the UK arXiv.org mirror, Citation data from Citebase Search) Pearson correlation after 6 months of web logs = 0.42 for the High Energy Physics sub-arXiv

28 April 2004Second Nordic Conference on Scholarly Communication 19

28 April 2004Second Nordic Conference on Scholarly Communication 20

28 April 2004Second Nordic Conference on Scholarly Communication 21

28 April 2004Second Nordic Conference on Scholarly Communication 22

28 April 2004Second Nordic Conference on Scholarly Communication 23

28 April 2004Second Nordic Conference on Scholarly Communication 24 Assessing Research(ers) Citation Impact –By-Paper, Author, [Journal, Institution] Web Impact –Predictor of citation-impact, combine with citation-impact Search Engines More detailed research assessment

28 April 2004Second Nordic Conference on Scholarly Communication 25 Comparing Online/Offline Impact Using ISI CD-ROM data Use Web crawlers to find online articles Compare citation impact of online and offline articles –By discipline, by journal, by author? Initial results for Physics show 2-3x increase –arXiv.org Southampton, U. Quebec, Oldenburg (de)

28 April 2004Second Nordic Conference on Scholarly Communication 26 Relevant Web Pages EPrints – –IAR: Citebase Search – Celestial – Correlation Generator – Tim Brody