DAFFODIL Effective Support for Using Digital Libraries Norbert - - PowerPoint PPT Presentation

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Distributed Agents for User-Friendly

Access of Digital Libraries

DAFFODIL Effective Support for Using Digital Libraries

Norbert Fuhr University of Duisburg-Essen, Germany

*Supported by DFG as part of the Research Programme V3D2

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Distributed Agents for User-Friendly

Access of Digital Libraries

Daffodil concepts

1.

Strategic information access support

2.

Levels of system support

3.

Digital library life cycle

4.

Collaboration

5.

User-friendly integrated desktop

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 1. Strategic information access support

Levels of search activities (Bates 1990):

1.

Move: Low-level search function

(e.g. type in search term, view retrieved document)

2.

Tactic: several moves to further a search

(e.g. broaden/narrow a query)

3.

Stratagem: set of actions on a single domain

(citation database, tables of contents of journals)

4.

Strategy: complete plan for satisfying an information need

(e.g. subject search, browse relevant journals, find referenced articles)

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Distributed Agents for User-Friendly

Access of Digital Libraries

System architecture

Stratagems

Strategic support in 4 layers Federated digital libraries

• f different

types

Strategies User-Interface Tactics Moves DL DL DL Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Moves

Distributed search of data from different Digital Libraries & Web sources Provide homogenous access to data and functions ~15 sources accessed

User-Interface Strategies Tactics Moves Stratagems DL DL DL Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Resultlist

Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Combined detail view

Attributes Links internal external

Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Tactics

User-Interface Strategies Tactics Moves Stratagems DL DL DL

Combine services Speed up search Redefine query

Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Extract from Result List

Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Stratagems

User-Interface Strategies Tactics Moves Stratagems DL DL DL

Cover an information domain Combine all retrieved information & links

Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

Stratagems on the Desktop

– Subject Search – Author networks – Citation Search – Journal/Conference Run

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Distributed Agents for User-Friendly

Access of Digital Libraries

Author network based stratagems:

• 1. Author network

browse

• 2. Ranking a

document result set using author centrality

Author Networks

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Distributed Agents for User-Friendly

Access of Digital Libraries

Citation Search: Reference Tracking

A relevant document is dragged to the tool for citation tracking Documents that cite or are cited are retrieved Browsing, Inspection and Navigaton Drag and Drop Can be performed iteratively

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Distributed Agents for User-Friendly

Access of Digital Libraries

Strategy

Complex plan to fullfill a specific task

User-Interface Strategies Tactics Moves Stratagems DL DL DL Moves – Tactics – Stratagems – Strategies – GUI

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 2. Levels of system support
• 0. Rigid system behavior
• 1. Adaptive system
• 2. Proactive system

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Distributed Agents for User-Friendly

Access of Digital Libraries

Adaptivity

1.

Agents collect information

Library agents: content and technical aspects of connected DLs User agents: behavior of single users/user group

2.

Agents change system behavior based

• n collected info

Library agents: select preferred DLs,… User agents: offer preferred functions,…

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Distributed Agents for User-Friendly

Access of Digital Libraries

Proactivity

Agents act without explicit invocation Implemented as event-condition-action rules, e.g.

– when query result is empty, broaden query – suggest related keywords for query – when author name is ambiguous, display

possible completions

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Distributed Agents for User-Friendly

Access of Digital Libraries

Proactivity

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 3. Digital library life cycle

Resource selection Organizing items Evaluation of results Knowledge generation Retrieving items

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Distributed Agents for User-Friendly

Access of Digital Libraries

Collate

Save all digital objects in a structured personal digital library Awareness:

– Keep an eye on my topics – focused crawling (BINGO!)

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Collate

Personal library:

Store Objects

• Document Metadata
• Fulltexts
• Authors
• Journals, Conferences
• Hyperlinks, Bookmarks
• Query formulations

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Personal Library

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Distributed Agents for User-Friendly

Access of Digital Libraries

Interpret

Annotations to DL objects Creation of links between DL objects

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Re-Present

(support generation of new information) Export folders from personal library

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 4. Collaboration

Private Group Private Public Group Private

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Collation and awareness

New objects

(by other users/ due to profile)

Notification mechanisms

(visual markers/ email)

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Collaborate interpretation

Annotation threads

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

Recommendation

Recommended digital objects through collaboration:

– What do others have for me? – Who are the others? – How did others search?

Discover – Retrieve – Collate – Interpret – Re-Present

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 5. User-friendly integrated desktop

Integrate distributed services and software agents in consistent manner Provide tool chains to enable users to combine services Ensure flexible workflow with free choice

• f starting point

Hide complexity

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Distributed Agents for User-Friendly

Access of Digital Libraries

Desktop

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Distributed Agents for User-Friendly

Access of Digital Libraries

Search

Search Domain Specification Filter Settings and Query Composition Integrated Result Lists with Draggable Objects Navigation Detail Inspection

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Distributed Agents for User-Friendly

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• 6. Evaluation

Evaluation with 28 subjects Methods: questionnaire, logging, video Tasks of different complexity Major results:

– Only for very simple tasks (known item

retrieval), other methods may be faster

– Complex tasks are supported very

effectively

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Distributed Agents for User-Friendly

Access of Digital Libraries

• 7. Summary

Daffodil concepts

• Strategic information access support
• Levels of system support
• Digital library life cycle
• Collaboration
• User-friendly integrated desktop

Representational Model of Common Elements

Interaction

Understanding Queries Massaging Results & User Annotation Transformations Discovery Automatic Capture Interpretive Capture Managing Personal Libraries DWIM Cognitive Completion Chunking Collaboration

[Larsen & Wactlar: Summary of NSF WS on Future Directions for DLs, 2003]

Store User

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Distributed Agents for User-Friendly

Access of Digital Libraries

Outlook

Further research

–

Support strategies

–

Path model: define/learn successful usage patterns

–

New application domains:

• additional object types,
• support re-present stage

Application for large user communities Try Daffodil: http://www.daffodil.de