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Presentation about our community-driven approach for reputation eliciting and estimation, given at the Altmetrics Workshop, during WebSci Conference 2011 held in Koblenz, Germany.
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UCount: A community-driven approach for measuring Scientific Reputation
Cristhian ParraUniversity of Trento, Italy
Altmetrics Workshop / websci2011
Context
http://beta.kspaces.net/ic/ http://reseseval.org/http://liquidjournal.org/
What is Scientific Reputation?
Scientific Reputation is the social evaluation (opinion) by the scientific community of a
researcher or its contributions given a certain criterion (scientific impact)
Main Goal
How, Why ?
To understand the way reputation is formed within and across scientific communitiesunderstand
[Insert footer]http://reseval.org/survey
DatasetTop H-Index (>200)
79 total Replies8 Online Surveys
ICWE (18)BPM (20)
VLDB (15)...
http://www.cs.ucla.edu/~palsberg/h-number.html
Experiment #1: LiquidReputation Surveys
Results published in ISSI2011 and SEBD2011
1
23
# Publications (DBLP)
H-Index (Palsberg)
H-Index (Script)
Correlation Results
MIUR* CNRS**
Researchers 664 >1000
Areas 12 45
Output Winner/Loser Pairs Selected ResearcherRanked Waiting Lists
# Rankings 333 pairs (with H-Index >= 0)208 pairs (with H-Index > 0)
196 Rankings of 5 researchers in average
(*) http://reclutamento.murst.it/ (**) http://intersection.dsi.cnrs.fr/intersection/resultats- cc- en.do
Experiment #2: Position Contests Analysis
Results
• Surveys:– Correlation between bibliometric indicators and
reputation is always in the rank of (-0.5:0.5)• Research Position Contests– CNRS dataset: same result as in surveys– Italian dataset: around 50% of effectiveness in
predictions for all metrics
Bibliometrics are not a good describer of real reputation
UCount Methodology
UCount Sci. ExcellenceUCount Reviewer Score
UCount
Eliciting Reputation
Community oriented Surveys
Peer Review based assessment(Research Position Contests)
SurveysBeen there
Peer Review Feedback
UCount Surveys
DBLP Coauthorship Graph
ICST
Palsberg
http://www.cs.ucla.edu/~palsberg/h-number.htmlhttp://icst.org/icst-transactions/
Editorial Boards
Top H Researchers
AffinityShortest Path +
Jaccard
List of Candidates
http://icst.org/UCount-Survey/
UCount
Surveys Results
Derive Reputation Functions
Peer Review Feedback
UCount Scientific Impact
UCount Reviewer Score
Reverse Engineering of Reputation
# Real reputation
5.5 Alon Halevy
4.7 Stefano Ceri
3.9 Tim Berners Lee
3 Jim Gray
# Estimated Rep.
5.1 Alon Halevy
4.2 Tim Berners Lee
3.7 Stefano Ceri
2.9 Jim Gray
Features
H-Index
Affiliation
Citations
Readership
Combine
Minimum Distance
Other Features?
UCount
Surveys Results
Derive Reputation Functions
Peer Review Feedback
UCount Scientific Impact
UCount Reviewer Score
Community Reputation
Functions Library
Reverse Engineering Approaches
• Decision Trees– No tree with more than 60% of accuracy
• Unsupervised Methods– Genetic algorithms applied on CNRS Dataset improved
correlation in an average of 15% (running only for 5 minutes)– Highly improved correlation for fields Research Management
and Politics. • Next
– Applying Machine Learning techniques– Explore other techniques (e.g. neural networks)– Obtain other types of features (e.g. keynotes, advisory
networks)– http://code.google.com/p/revengrep/ – https://github.com/cdparra/melquiades/
Where are we now?
Thanks!
Questions?
Ideas?