project report: semantic portal business and economics
DESCRIPTION
NKOS Workshop September 19 th 2008 Aarhus, Denmark. Project Report: Semantic Portal Business and Economics. Kai Eckert Computer Science Institute University of Mannheim Germany. Magnus Pfeffer University Library University of Mannheim Germany. Project Goal. - PowerPoint PPT PresentationTRANSCRIPT
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Semantic Portal Business and Economics – Project Report
NKOS WorkshopSeptember 19th 2008
Aarhus, Denmark
Project Report:Semantic Portal Business and Economics
Kai EckertComputer Science Institute
University of MannheimGermany
Magnus PfefferUniversity Library
University of MannheimGermany
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2/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Project Goal
Creating a OPAC+ Library Search Enginge Content
Library media All licenced fulltext documents Focus on economics
Modern user interface Thesaurus-based search and retrieval Drill-down using facets Support multiple thesauri
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3/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Research Topics
Automatic indexing in the field of economics Thesaurus-based user search interfaces Multi-thesaurus indexing and search
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4/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Current Status
Prototype indexing system Elsevier journal articles STW Thesaurus Collexis Search Engine
Datasets Automatic indexing results Manually indexed articles as gold standard
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5/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Automatic Indexing Assessment
Precision and recall comparison Meaningless numbers on the macro level Tedious on the micro level
Visual analysis using Semtinel Per concept IC-Diff analysis Treemap for navigation Easy identification of critical concepts
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6/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff Analysis with Semtinel
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7/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Automatic Indexing Assessment cont.
Editing of example critical thesaurus concepts Lack of sysnonyms Insufficient disamgibuation Overly broad concepts
Reindexing Improved Precision and recall
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8/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Further Steps
Analysis and Semtinel Tool Improve framework (SKOS loader) Document based analysis methods
Multi-Thesaurus Retrieval Multiple indexes Merging multiple thesauri UI Design
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9/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Further Steps cont.
Prototype retrieval system Collexis engine and user interface User study
Integration into library systems Representation using RDF and DC Evaluation of Ex Libris “Primo” product
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10/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Open Questions
How can one judge indexing results? Is our approach reasonable?
More ideas or use-cases for Semtinel? Feature-Requests? (e.g. Ontology-Editor, ...)
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11/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Thank you for your attention.
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12/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Additional Slides
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13/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff Analysis
D IC c = IC c − IIC c
IC c=−log P c IIC c=−log hypo c1max
Information Content:Proposed by ResnikDepends on Frequency in Document Base
Intrinsic Information Content:Proposed by Seco, Veale und HayesBased on the Number of Subconcepts
Intuitive: A value between -1 and 1 that says, if a concept has a suspicious frequency regarding its position in the thesaurus.
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14/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Semtinel Workbench
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15/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Semtinel APISTW
SKOS
CSV CDSKEA
Pubmed
Access
ConnectorFramework
ThesaurusViewer
CoreOverview
IC Diff
Collexis
RVKMeSH
SemtinelCore
I/OFramework
AnalysisFramework IC, IIC
Children
Frequency
GUIFramework
TreemapVisualizer
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16/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Intrinsic Information Content
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17/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Information Content
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18/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
IC Diff
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19/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Bioscience
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20/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Organisms
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21/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Animals
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22/11Kai Eckert and Magnus Pfeffer
Semantic Portal Business and Economics – Project Report
Persons