P ower B rowser P roject - PowerPoint PPT Presentation

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  1. Power Browser Project Orkut Buyukkokten Hector Garcia-Molina Andreas Paepcke The Stanford Digital Library

  2. Access to Digital Libraries from Anywhere • Content: Enable easy access to digital information wherever it is needed • Purpose: Make digital libraries relevant to everyday life • Strategy: Study limitations of handheld devices Understand/create user interface options Design & implement support proxies Study/compare user performance Study system performance

  3. Challenges of PDA Platform • Small display • Limited input modalities (Pen input is slow) • Slow CPU • Battery lifecycle • Small memory • Limited bandwidth

  4. Four Key Ideas • Special browser to take advantage of Web structure • Text summarization • Automatically created site search • Automatic completion of search keywords

  5. Architecture Site B Site C Site D Site A The World-Wide Web User • Browsing • Searching Proxy provides: • Navigation Support • Dynamic Site Search • Site-specific Word Completion • Search requests • Partial keywords PDA Client Wireless Network Index Proxy Server • Browse views • Summaries • Word lists • Search results

  6. Navigation/Viewing Navigation Viewing Navigation Viewing Browsing Patterns • A conventional Browser • Power Browser

  7. Navigation / Viewing

  8. Global Search Navigation/Viewing Global Search Navigation/Viewing Local Search Navigation/Viewing Nav. Global Search Local Search Navigation Viewing Browsing Patterns • Typical Search Pattern • Improvement with some Web sites • Power Browser

  9. Word Completion/ Results

  10. Challenges • Effective gestures • Animation timing • How many letters to wait for • Which site portions to crawl incrementally • …

  11. Status • Implementation • Client 3930 lines, C++ • Proxy Server 3164 lines, Java • Extensive User Studies comparing to other approaches • 45% gain in browsing speed • 42% reduction in pen movements • Publications • Power Browser: Efficient Web Browsing for PDAs (CHI 2000) • Focused Web Searching with PDAs(WWW Conference 9, 2000)