May 26-28ICNEE 2003 ARCHON: BUILDING LEARNING ENVIRONMENTS THROUGH EXTENDED DIGITAL LIBRARY SERVICES...

May 26-28 ICNEE 2003

ARCHON: BUILDING LEARNING ENVIRONMENTS THROUGH EXTENDED DIGITAL LIBRARY

SERVICES

Hesham Anan, Kurt Maly, Mohammad Zubair,et al.

Digital Library Group

Old Dominion University

Norfolk, VA 23529


Outline

• Motivation.

• Overview.

• Archon Architecture.

• Equation and Formulae Searching.

• Reference Linking.

• Conclusions and Future Work.


Motivation

Lack of a federation service that:– provides an unified interface to diverse

collections in the physics– supports metadata that differ in richness,

syntax, and semantics

• Lack of services tailored to physics students and researchers needs


Overview

• Archon is a federation of physics digital libraries. • Its architecture provides the following basic

services: – a storage service for the metadata of collected

archives; – a harvester service to collect data from other digital

libraries using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH) ;

– a search and discovery service; – and a data provider service to expose the collected

metadata to other OAI-PMH harvesters.


Overview

• For Archon we have developed a range of services especially for physics collections such as:– a service to allow searching on equations

embedded in the metadata, and– a cross-archive citation service – A focus library for personal use


Archon Architecture

User Interface

Search Engine (Servlet)

JDBC

Data Normalization

History Harvest

Daily Harvest

Data Provider

Data Provider Cache Relational

Database (Oracle)

Harvester

Extended Services

Search users usersusers

Publishing users


Overview


Focus library

• Created web service to allow students and teachers to create personal collections.

• These services use Web Services standards including the use of SOAP requests and response in communication between the clients and the services.

• Examples of these services include:– Search Service– Book Shelf Service


Focus library

• Book Shelf Service – allows each user to have a set of personalized collection which is subset

of the overall archives

– enables teachers to collect course materials and package it in a personalized collection

– enables students that are doing research in a topic to make a special collection that contains all the related documents in that collection.

• Search Service – provides access to all search functionality without the need to use the

Archon interface– allows each user (e.g. teacher) to provide customized client for the

collections that can have special features according to a course’s needs.


Equation and Formulae Searching

• Students remember equations

• Can be used to search for relevant papers

• Issues– How to input equations:

• Select form set of choices

• Textually identify subject

• Select by categories

– How to display equations• Preprocess and create gif files• Overlay latex, the like in text with gif files


Equation and Formulae Searching


Reference Linking

• Comon tasks for students:– Prepare bibliography– Starting with one paper read other relevant papers

and prepare report

• Archon provides:– the references information for a document – links from the references to their corresponding

documents.

• Archon reference linking service provides reference-linking service among member collections and to outside collections


Reference Linking

• we use multiple rules to match citations and documents based on what kind of the information is present – use CERN software.

• In cases that a reference fails to match any document in our collections, we compute the similarity between the citation and documents to find possible links.


Reference Linking


Reference Linking

ArXiv

Articles: 160,606 References: 4,838,158

APS PRD

Articles: 35,731 References: 686,521

Unknown

Others (PRA, PRE, etc.)

121,678

326,739 1,652,507

1,084,600

248,443

98,807

165,902 1,877,811


Conclusions and Future Work

• Collections have overlapping holdings, need strong de-duplication service

• Expand the personalization effort to allow students and researchers to integrate the DL information into their writing of reports and papers

• Test a role based access system that allows for each contributing collection to have different policies for different organizations

• Fully automate the update process of various services for continuous harvesting from member collections

May 26-28ICNEE 2003 ARCHON: BUILDING LEARNING ENVIRONMENTS THROUGH EXTENDED DIGITAL LIBRARY SERVICES...

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