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Wireless and Mobile Access to Digital Libraries

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

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Wireless and Mobile Access to Digital Libraries

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

  2. Worldwide 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 and animations • Intelligent and powerful mobile devices

  3. Korean Market • One of the fastest growing markets • Early adapters of new technologies • Lifestyles that demand ubiquitos/ untethered communications

  4. 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 A typical day of Youngsoo 160 minutes (2:40) on the road!

  5. US Universities Research & Publications Korean Universities Technology Transfer Pilot Applications Commercial Deployment Korea-US Collaboration Korean Companies

  6. HANUL • A mediator-based DL system • Integrate distributed information sources to create one single virtual library for the user • Query Recycling • Virtual Index Manager • Result Set Manager • Result Cache Manager

  7. Cd Ca Cb Ce Cc Evolving Hierarchical Topic Structure • Semi-supervised clustering of documents • Hierarchy reorganization/ restructuring operations Ca Cb Cc Cd Ce Semi-supervised clustering Clustering area Fuzzy concept subsumption matrix Sub-hierarchy Cd =0.8 Ca Cb Ce Cc

  8. Mall Mall End Purchaser End Purchaser Catalog Object Server Central Repository Server DC Manufacturer Catalog Manufacturer Catalog Manufacturer Manufacturer CatalogStop • A digital catalog library system for catalog sharing and standardization • Extended Catalog Model • Catalogs • the hierarchy

  9. PDA Data Management • An embedded DB engine for PDA (JTEL’s CellVic) • main memory database management • support for PDA-specific functions • small footprint • sync management

  10. Gestational Diabetes • Anytime, anywhere telemedicine • Diabetes + pregnancy => close monitoring

  11. Query by Taxonomy • Query/navigational characteristics of mobile interaction • Personalized and evolving taxonomy

  12. Summary • Wireless access to digital library is important • QBT and other relevant problems/ issues are interesting • Ideal area for Korea-US collaboration

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