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Wireless and Mobile Wireless and Mobile Access to Digital Access to Digital Libraries Libraries Sang-goo Lee School of Computer Science and Engineering Seoul National University Seoul, Korea

Wireless and Mobile Access to Digital Libraries

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Wireless and Mobile Access to Digital Libraries. Sang-goo Lee School of Computer Science and Engineering Seoul National University Seoul, Korea. Worldwide Market. Year 2000 to year 2007 subscribers: 530 million to 1,370 million service revenue: $295 billion to $521 billion - PowerPoint PPT Presentation

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Page 1: Wireless and Mobile Access to Digital Libraries

Wireless and Mobile Access to Wireless and Mobile Access to Digital LibrariesDigital Libraries

Sang-goo Lee

School of Computer Science and Engineering

Seoul National University

Seoul, Korea

Page 2: Wireless and Mobile Access to Digital Libraries

Worldwide MarketWorldwide Market

Year 2000 to year 2007– subscribers: 530 million to 1,370 million– service revenue: $295 billion to $521 billion

Better technologies– 3G services by 2003 (Europe and Asia)– Protocols (eg, WAP) to include graphics an

d animations– Intelligent and powerful mobile devices

Page 3: Wireless and Mobile Access to Digital Libraries

Korean MarketKorean Market

One of the fastest growing marketsEarly adapters of new technologiesLifestyles that demand ubiquitos/ unteth

ered communications

Page 4: Wireless and Mobile Access to Digital Libraries

A typical day of YoungsooA typical day of Youngsoo

7:00 Wake up 8:00 Leave home 8:10 Get on bus 8:20 Transfer to subway 8:50 - 14:00 3 classes,

lunch, and pools 14:15 Get on subway 14:30 Transfer to

another line 14:50 ESL class

16:45 Get on bus 17:00 Math Tutoring 19:00 Get on bus 19:35 Dinner and

Karaoke with girlfriend 21:30 Get on

bus/subway 22:05 Back home

160 minutes (2:40) on the road!

Page 5: Wireless and Mobile Access to Digital Libraries

Korea-US CollaborationKorea-US Collaboration

US Universities

Korean Universities

Research & Publications

Technology Transfer

Pilot Applications

Commercial DeploymentKorean Companies

Page 6: Wireless and Mobile Access to Digital Libraries

HANULHANUL

A mediator-based DL system– Integrate distributed information sources to

create one single virtual library for the userQuery Recycling

– Virtual Index Manager– Result Set Manager– Result Cache Manager

Page 7: Wireless and Mobile Access to Digital Libraries

Evolving Hierarchical Topic Evolving Hierarchical Topic StructureStructureSemi-supervised

clustering of documents

Hierarchy reorganization/ restructuring operations

Clustering area

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Fuzzy concept subsumption matrix

Semi-supervisedclustering

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Sub-hierarchy

Page 8: Wireless and Mobile Access to Digital Libraries

CatalogStopCatalogStop

A digital catalog library system for catalog sharing and standardization

Extended Catalog Model– Catalogs – the hierarchy

MallMall MallMall

Central RepositoryServer

Central RepositoryServer DCDC

ManufacturerManufacturer ManufacturerManufacturer

EndPurchaser

EndPurchaser

EndPurchaser

EndPurchaser

ManufacturerCatalog

ManufacturerCatalog

CatalogObjectServer

CatalogObjectServer

ManufacturerCatalog

ManufacturerCatalog

Page 9: Wireless and Mobile Access to Digital Libraries

PDA Data ManagementPDA Data Management

An embedded DB engine for PDA (JTEL’s CellVic)– main memory database management– support for PDA-specific functions– small footprint– sync management

Page 10: Wireless and Mobile Access to Digital Libraries

Gestational DiabetesGestational Diabetes

Anytime, anywhere telemedicine

Diabetes + pregnancy => close monitoring

Page 11: Wireless and Mobile Access to Digital Libraries

Query by TaxonomyQuery by Taxonomy

Query/navigational characteristics of mobile interaction

Personalized and evolving taxonomy

Page 12: Wireless and Mobile Access to Digital Libraries

SummarySummary

Wireless access to digital library is important

QBT and other relevant problems/ issues are interesting

Ideal area for Korea-US collaboration