1 Oscar Rodriguez Rocha Cristhian Figueroa Iacopo Vagliano Boris Moltchanov Linked Data-Driven Smart Spaces
1
Oscar Rodriguez RochaCristhian FigueroaIacopo Vagliano
Boris Moltchanov
Linked Data-Driven Smart Spaces
2
Outline
1. Introduction
2. Reference platform and use case
3. Evaluation
4. Conclusion
3
Linked Data Cloud
4
Context
● Information about Smart Space components in Linked Data Cloud
● Increasing number of mobile devices and their capabilities
● Improvements in content generation on-the-go (mobile UGC)
● Critical to provide to end user right information in the right moment
5
Aims
1. Linked Data based approach for
a) Enabling interactions among Smart Space components
b) Enabling interactions Smart Space component – end user
c) Retrieving and enriching information about Smart Space components
2. Practical application of the approach
6
Architecture
RecommenderSystem
UGCManager
SemanticAnnotator
Reference platform
DBpedia
7
Linked Data-Driven Recommender Systems
● Suggest items to users
– Linked Data-based similarity– Three types
● Hierarchical● Transversal● Hybrid
8
Recommendation Algorithm
Ranked set of items (classified by categories)
Item (URI)
9
Recommendation Algorithm
CategoryExtraction
Ranked set of items (classified by categories)
Item (URI)
10
Recommendation Algorithm
CategoryExtraction
SubcategoryExtraction
Ranked set of items (classified by categories)
Item (URI)
11
Recommendation Algorithm
CategoryExtraction
SubcategoryExtraction
ItemExtraction
Ranked set of items (classified by categories)
Item (URI)
12
Recommendation Algorithm
CategoryExtraction
SubcategoryExtraction
Item Extraction
Item -category Mapping
Ranked set of items (classified by categories)
Item (URI)
13
Recommendation Algorithm
CategoryExtraction
SubcategoryExtraction
Item Extraction
Item -category Mapping
TransversalSimilarity
Calculation
Ranked set of items (classified by categories)
Item (URI)
14
Recommendation Algorithm
CategoryExtraction
SubcategoryExtraction
Item Extraction
Item -category Mapping
TransversalSimilarity
Calculation
Categorizationand
Ranking
Ranked set of items (classified by categories)
Item (URI)
15
Use Case
Peter and Paul fortress
Hermitage Museum
St. Isaac's Cathedral
St. Petersburg Smart Space
16
Use Case
Peter and Paul fortress
Hermitage Museum
St. Isaac's Cathedral
St. Petersburg Smart Space
DBpedia information +
17
Use Case
Peter and Paul fortress
Hermitage Museum
St. Isaac's Cathedral
St. Petersburg Smart Space
18
Execution Time
19
Candidate Items
20
Conclusion
1. Linked Data based approach to manage Smart Space components information
2. Enrich information about Smart Space components
3. eToursim use case implemented with Telecom Italia
21
большое спасибо
22
Future Works
● Accuracy evaluation ● Integration of FI-WARE Context Management
GE (context broker)● Addition of smart space components in Linked
Data cloud● Additional use cases (museum)
23
Accuracy Evaluation
● Goal
– Method to use– Recommender system to use for comparison
● Method
– Systematic review– 69 papers included
● Result
– User studies most used
24
Semantic Annotator
Text
ProcessorSemantic
Broker Resolvers
SemanticFilterAggragator
25
UGC Manager
RESTAPI
SPARQLEndpoint
SQL
RDF