Spagnolo ph day2011

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Spagnolo ph day2011

  1. 1. DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE PhDAY 2011Exploratory computingdesigning engines for discovery-driven userexperiencesLuigi Spagnolo: spagnolo@elet.polimi.it
  2. 2. Exploration vs. search DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  E.g. a website presenting a research lab•  Search task: §  "find recent significant publications on a certain argument and/or by certain authors"•  Exploratory user experience: §  understand the research interests of the lab (and of its members) and how they evolved over time. §  Evaluate the quality of research in terms of publications and of collaboration with other universities.
  3. 3. Exploration: a definition DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  Moving into a information space representing a certain domain §  The purpose: discovering additional information the properties (the facets) of the objects in it §  A sort of user-centred, interactive data mining §  The query is not aimed at finding a set of objects, but rather… §  At defining the target set of objects whose properties are observed and analysed PhDAY 2010 - DEI 3
  4. 4. My proposal: FELIS DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  Faceted Exploration for Leverage of Information Systems•  A comprehensive framework for exploratory user experiences, covering: §  knowledge representation and querying §  widgets and interaction patterns for semantic faceted explorations §  information visualization strategies to highlight the correlation between properties, supported by exploration metrics PhDAY 2010 - DEI 4
  5. 5. FelisQL DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  A language for knowledge representation and querying §  An extension to LISQL (Ferré 2011, University of Rennes I) §  Can be seen either as a different notation for RDF/SPARQL or as an autonomous, high level query language•  User and application centred perspective: §  High expressive power §  Queries easily represented in the interface §  Uniform way of describing resources coming from different sources (e.g. mash-ups) and of different kind (controlled vocabularies, ontologies, folksonomies, text mining data) §  Simplified exchange of structured data between client and server in rich internet applications PhDAY 2010 - DEI 5
  6. 6. FelisQL: a query DIPARTIMENTO DI ELETTRONICA E INFORMAZIONEa publication and author: (an associate professor and affiliation: ‘Politecnico di Milano’) at position: “first” or “second”, (a researcher and affiliation: (an university and country: not ‘Italy’)) Publications having as first or second author anassociate professor from Politecnico di Milano, and asas additional author a researcher that is affilated to anuniversity that is not in Italy
  7. 7. The interface | 1 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  Facet widgets allow to navigate and analyse items according to a specific property (e.g. author)•  Hyperlinks allow for query trasformations §  Add new constraints (existential restrictions) on specific properties and (the facets) §  Add alternatives on the existing filters•  Focus: any sub-expression of the query §  The point at which a new filter is “appended” à allows to build full-Boolean queries of arbitrary depth §  A different point of view on the target of the exploration PhDAY 2010 - DEI 7
  8. 8. The interface | 2 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE PhDAY 2010 - DEI 8
  9. 9. The interface | 3 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE PhDAY 2010 - DEI 9
  10. 10. Information visualization | 1 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE•  Tag clouds and histograms to represent the relevance of facet values•  Possible measures of relevance §  E.g. given the query a Publication and author: (an ‘Associate Professor’ and the restriction subject: “exploratory interfaces” §  Count: how may publications that are authored by an associate professor have also “exploratory interfaces” as subject? §  Recall: how many of those that have “exploratory interfaces” as subject are also authored by an associate professor? §  Other “custom measures”: e.g. average impact factor of publications having “exploratory interfaces” as subject •  Multi-dimensional views for query results: charts, maps, etc.•  Metrics for measuring “changes in explorations” PhDAY 2010 - DEI 10
  11. 11. Information visualization | 2 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE An interactive map of venues of archaeologic interest in Italy with location: “Northern Italy” selected PhDAY 2010 - DEI 11
  12. 12. Information visualization | 3 DIPARTIMENTO DI ELETTRONICA E INFORMAZIONE Shift to location: “Southern Italy” the colors indicate the increase/decrease of relevance of ancient civilizations in this area w.r.t. to North PhDAY 2010 - DEI 12
  13. 13. DIPARTIMENTO DI ELETTRONICA E INFORMAZIONEThank you for your kindattention!For questions and details, write me at spagnolo@elet.polimi.it PhDAY 2011 - DEI 13

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