1 nsdl the national science foundation's national digital library for science, mathematics,...
Post on 20-Dec-2015
225 views
TRANSCRIPT
1
NSDL
The National Science Foundation's
National Digital Library for Science, Mathematics,
Engineering and Technology Education
[a.k.a. Smete, NSDL, Learns, ...]
William Y. Arms
2
The NSDL Library Project
1996 Vision articulated by NSF's Division of Undergraduate Education
1997 National Research Council workshop
1998 Preliminary grants through Digital Libraries Initiative 2
1998 SMETE-Lib workshop
1999 NSDL Solicitation
2000 6 Core Integration System projects + 23 others funded
2001 1 very large Core Integration System project to be funded
3
Collections and Services
Scientific and technical information
Materials used in education
Materials tailoredto education
4
Core Partners
5
All Partners
6
Core Integration System projects
University of California at Berkeley (Alice Agogino) Materials for education in engineering and other disciplines
Cornell University (William Arms)Comprehensive scientific collections and services
University of Missouri – Columbia (Su-Shing Chen)National biology digital library
University Center for Atmospheric Research (David Fulker)Federated NSDL for earth system education
Eastern Michigan University (Ellen Hoffman)Digital community and collections for teacher education
Columbia University (Kate Wittenberg)Columbia Pubscape – NSDL Publishing Center
7
Collections Track
Biology Education Online – An Interactive Electronic Journal
A Digital Multimedia Library for Health Sciences Education
Bioscience Education Net
Digital Library for Earth Systems Education
Atmospheric Visualization Collection
MATHDL – Online Learning Materials in Mathematics
A Digital Library Network for Engineering and Technology
Mathematics, Science, and Technology Teacher Preparation
Geoscience (Solid Earth) Data Sets [Muamia Barazangi]
The Alsos Digital Library
8
Services Track
Prioritizing Content Creation in Digital Libraries
Peer Review of Digital Learning Materials
Electronic Journal of Earth System Science Education Resources
Breaking the Metadata Generation Bottleneck
Discovering, Recommending, and Combining Learning Objects
Information Pathways through NSDL Video
Component Repository & Environment for Teaching Environments
9
Research Track
Metadocuments as Communicative Artifact
10
Cornell Team
William Arms Overall coordination
Carl Lagoze Architecture
Diane Hillmann Metadata
Dean Krafft Systems
Rich Marisa Architecture and engineering
Mutaamba Maasha Programming
John Saylor Collections development
Carol Terrizzi Design and communications
Sarah Thomas Cornell University Library
Herbert Van de Sompel Services
11
The NSDL as a Collaborative VentureHow to ensure that the projects become partners, not
competitors
12
Fundamental Question: Leverage
How can the NSDL Library be more than the sum of its parts?
Which separate activities can NSDL bring together?
Which existing, fragmented activities can be combined as the initial nucleus of NSDL?
The projects are attempting to develop a shared vision
13
The NSF
The NSDL needs the NSF to succeed:
Prestige and visibility
Funding for partners and central coordination
Associated research programs
Shared identity (www.nsdl.nsf.gov)
Guidelines and service standards for creators of scientific and technical information!!!
14
Collection Development Policy
The NSDL partners could:
concentrate on educational materials be a general purpose science library
concentrate on open access materialsinclude formally published materials,
preprints, web sites and similar materialsbe a long term archive
Cornell vision: The NSDL must have a very comprehensive collections development policy
15
Audience
The NSDL could:
concentrate on the needs of science teachers serve students directly emphasize independent learners
Cornell vision: The NSDL should aim to serve every one of these communities and more.
16
Information Discoveryand Quality of Materials
The NSDL could:
help people find information provide catalogs and indexes
review educational materials and validate them for scientific and educational
content
Cornell vision: The NSDL should aim to provide every one of these and more.
17
Unanswered Questions
1. The NSDL could:
facilitate new kinds of collaboration
How would this benefit education?
2. The NSDL could:
provide access to curriculum materials
But would people use them?
18
Cornell Architecture:
Interoperability
19
Cornell Architecture
User portals
Distributed collections
Central services, metadata collections, etc.
20
Components of Interoperability
Technical agreements cover formats, protocols, security systems so that messages can be exchanged, etc. Content agreements cover the data and metadata, and include semantic agreements on the interpretation of the messages. Organizational agreements cover the ground rules for access, for changing collections and services, payment, authentication, etc.
Challenge is to create incentives for independent digital libraries to adopt agreements
21
Levels of Interoperability
Level Agreements Example
Federation Strict use of standards AACR, MARC(syntax, semantic, Z 39.50and business)
Harvesting Digital libraries supply Open Archivesbasic metadata; simple
protocol and registry
Gathering Digital libraries do not Web crawlerscooperate; services must and search enginesseek out information
22
Metadata Harvesting
Distributed collections
Central services, metadata collections, etc.
Metadata harvest
Central data
23
Metadata
Digital libraries must support:
Unqualified Dublin Core
Digital libraries may support:
IMSFGDCor other recognized metadata sets
Simple XML tagged format -- protocol derived from Dienst
The big question: What effective services can we build with such minimal metadata?
24
Cornell Architecture:
Portals
25
A User's Wish List
To discover materials and services:
• Good science
• Comprehensible to students -- effective for teaching
• Stable -- will not change or disappear
Through services that are appropriate to the user's needs.
• No uniform catalog or index to everything
• Mixture of for-profit and open access information
26
Virtual Collections
NSDL
Links show the members of the virtual collection
27
Cornell Architecture
Portal
Tuner
Channel / Ontology Registry
Central services, metadata collections, etc.
28
Layered System View
Items are stored in (usually) independent repositories.
Surrogates for items and resources are stored in a central index.
Items and surrogates become part of the library by way of gather, harvest and publish services.
A search service allows items in the library to be discovered.
Continued on next slide
29
Layered System View (Continued)
Sets of items and/or resources are represented as channels. Channels may contain filters.
Channels are managed via a channel registry. Channels are grouped and organized in ontologies.
Channels and ontologies may be selected and filtered via a tuner.
The set of channels selected by a user is rendered by a portal.
The repository, catalog, search service and channel registry may be distributed. Multiple tuners and portals may be developed (based on common tools) and customized for specific audiences and applications.
30
Short Term: Demonstration System
Interoperability: Open Archives alpha test with pilot registry and harvester.
Collections: 10 large collections selected for varied content
Metadata: Unqualified Dublin Core, IMS, FGDC
Services: Basic searching and filtering (using minimal metadata), mockup of vocabulary support (?), SFX reference linking (?)
User support: Sample channels (about 100) [RSS]. Resources described to support channels [RDF]. Surrogate repository [Dienst]. Simple tuner. Portal rendering based on stereotypical users.
31
Long Term
What will make the NSDL Library a permanent part of the educational landscape?