one of meducator research goal:
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Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
One of mEducator Research Goal:
•Facilitate search and retrieval in the resource sharing process
•How: analyze the type of information that can be generated during the repurposing activity and find ways to coordinate it with all the information spaces that pertain to a LR to improve the search and retrieval capability of the content sharing system.
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
premises
•How do we search?– Focused VS exploratory search
•How do we repurpose?
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
LR Repurposing model
repurposed to
LRn
LR1
LRm
repurposed to
repurposed to
Repurposing DescriptionWhy (intended goals)
Activity (intended usage)
Repurposing links:Typed (repurposing contexts)
Weighted
Engagement?
Diagnostic reasoning?
Perceptual discrimination?
Conceptual model?
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Adding the social dimension…
LR metadata scheme
Tags space
Links space
Authors/Users space Reuse
& Activity space
LRm
Description
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Adding the social dimension…
LR metadata scheme
Tags space
Links space
Authors/Users space Reuse
& Activity space
LRm
Description
Multimedia Processing
Agents
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Adding the social dimension…
LR metadata scheme
Tags space
Links space
Authors/Users space Reuse
& Activity space
LRm
Description
Multimedia Processing
Agents
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Key aspects of the proposal
• Authors/users of the LR describe the repurposing activity that is anchored to the type of learning outcome and the intended strategy of use
• Usage of a clustering and association building method that supports exploratory search (so far overlooked)
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Exploratory Search
Search ProcessFocused
Search
Exploratory Search
I know exactly what I’m looking
for
I have a broad intuition of what I’m
looking for
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Exploratory Search
Search ProcessFocused
Search
Exploratory Search
The search process is
integral to query refinement
The search process is
integral to query refinement
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Possible solutions
Search ProcessFocused
Search
Exploratory Search
MetadataMetadata User-generated tagsUser-generated tagsvs
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
The problem we’re interested in
Search ProcessFocused
Search
Exploratory Search
MetadataMetadata User-generated tagsUser-generated tags
Repurposing informationRepurposing information
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
The problem we’re interested in: “Analogical” retrieval
“Query Matching” Retrieval
Exploratory Search
Metadata (LOM)Metadata (LOM)
User-generated tagsUser-generated tags
Repurposing: LinksRepurposing: Links
User Query
“Analogical” Retrieval
Repurposing: Usage descriptions
Repurposing: Usage descriptions
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
“Query matching” vs “Analogical” retrieval
“Query Matching” Retrieval• High precision
• Low recall
• Recall can be enhanced by semantic expansion
Similar experiences not necessarily described by same terms
Innovative practices described with unknown terms
Shortcomings:
Lexical-semantic similarity
Lexical-semantic similarity
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
“Query matching” vs “Analogical” retrieval
Similarity notion between Learning Resources is based on
- structural properties
- abstracting functionalities and roles from descriptions
Foundations:
“Analogical” Retrieval
• High recall
• Low precision
• Precision can be enhanced by post-hoc “query matching” filters
Description patterns similarity
Description patterns similarity
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
The method
• Moving from vectorial description of the LR to unsupervised classifications of descriptions
• Create a space of associations• Explore this space by
coordinated usage of analogical and standard query matching
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Step 1: LR vectorial representation
Id -LR LOMs TAGs Usage Repurposing 1
2 3
4
5 6
7
8 9
10
LR metadata scheme Tags
space Links space
Reuse & Activity space
Description
Description
LR vectorial representation
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Step 2: classification and positive features extraction
Id -LR LOMs TAGs Usage Repurposing 1
2 3
4
5 6
7
8 9
10
L1, L2
CU1
CR1
CU2
CU3
CL3CL4
CL1
1, 3, 4, 8
CL2
5, 7, 8 CT1
1, 3, 8, 9
CT2
CT3
L 3T1, T6 U3, U5
3, 8, 9, 10
5, 7, 8
2, 6, 7, 10
U1
CR2
CR3
R4
Unsupervised classifier (Kohonen SOM)
Positive features are the most shared ones in the class
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Step 3: deriving the associations
R4
L1, L2
CU1
CR1
CU3
CL3CL4
CL1
1, 3, 4, 8
CL2
5, 7, 8 CT1
1, 3, 8, 9
CT2
CT3
L 3T1, T6 U3, U5
3, 8, 9, 10
5, 7, 8
2, 6, 7, 10
U1
CR2
CR3
CU2
L1,L2 T1,T6
T1,T6 U3, U5
U1 R4
L1,L2 U3, U5
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Step 4: joint use QR and AR
R4
L1, L2
CU1
CR1
CU3
CL3CL4
CL1
1, 3, 4, 8
CL2
5, 7, 8 CT1
1, 3, 8, 9
CT2
CT3
L 3T1, T6 U3, U5
3, 8, 9, 10
5, 7, 8
2, 6, 7, 10
U1
CR2
CR3
CU2
L1,L2 T1,T6
T1,T6 U3, U5
U1 R4
L1,L2 U3, U5
Associations are signalled of their classes share a number of elements above a user set threshold
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Step 4: joint use QR and AR
Query
matching
1th Module
User Query d1 d7
Analogical
Retrieval 1th module
CL1 CT1 CU2 CR3
Analogical
Retrieval
2nd moduleLexical Filter
CL1 CU1 Analogical
Retrieval
3rd module
L1,L2 T1,T6 L1,L2 U3,U5 U1 R4
Analogical
Retrieval
4th module
L1 T6 d1 d3 d8
Query
matching
2th Module
Lexical Filterd3 d8
d1d3d4d8d9
d10
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
The opportunities….
• No commitmente to a priori organization of the metadata
• Independent classification on subsets
• Incremental addition of other information spaces
• Capturing contexts and practices that do not share a common vocabulary yet
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
The challenges….
• Periodic indexing and re-classification
• Some info that is input to classification spaces more difficult to automatically collect in a distributed repository model
• Usable interfaces to support the exploratory process
• Evaluation of suitable metrics for the classification
Plovdiv, Plovdiv, Bulgaria 21-01-Bulgaria 21-01-
20102010
D. Giordano, E. Kaldoudi et al. D. Giordano, E. Kaldoudi et al. 2nd Int. Workshop on Multitype 2nd Int. Workshop on Multitype Content Repurposing in Medical Content Repurposing in Medical
Education Education
Thanks for your attention!
Questions?
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