Citation Analysis for the Free, Online Literature Tim Brody Intelligence, Agents, Multimedia Group University of Southampton

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

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

Institutional Archives Registry

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 Can’t (yet) track full-texts (Create a master-list so archives only register-once?)

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

Can’t (yet) track full-texts

(Create a master-list so archives only register-once?)

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

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

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 aren’t citation-analysis aware yet, Google indexes Citeseer. Not an exhaustive list …

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)

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)

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.)

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.)

Citebase Search

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

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

Citebase Search

Citebase Search: Navigation by Citation Links Current Article Co-cited Article with reference list Reference link Future Past Related

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

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

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

Citation Impact

By-Paper, Author, [Journal, Institution]

Web Impact

Predictor of citation-impact, combine with citation-impact

Search Engines

More detailed research assessment

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)

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)

Relevant Web Pages EPrints – http:// www.eprints.org / IAR: http:// archives.eprints.org / Citebase Search http://citebase.eprints.org/ Celestial http://celestial.eprints.org/ Correlation Generator http://citebase.eprints.org/analysis/correlation.php Tim Brody <tdb01r@ecs.soton.ac.uk>

EPrints – http:// www.eprints.org /

IAR: http:// archives.eprints.org /

Citebase Search

http://citebase.eprints.org/

Celestial

http://celestial.eprints.org/

Correlation Generator

http://citebase.eprints.org/analysis/correlation.php

Tim Brody <tdb01r@ecs.soton.ac.uk>