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Orkut Buyukkokten. Hector Garcia-Molina. Andreas Paepcke. The Stanford Digital ... Content: Enable easy access to digital information wherever it is needed ...

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p ower b rowser p roject

Power Browser Project

Orkut Buyukkokten

Hector Garcia-Molina

Andreas Paepcke

The Stanford Digital Library

access to digital libraries from anywhere
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

challenges of pda platform
Challenges of PDA Platform
  • Small display
  • Limited input modalities (Pen input is slow)
  • Slow CPU
  • Battery lifecycle
  • Small memory
  • Limited bandwidth
four key ideas
Four Key Ideas
  • Special browser to take advantage of Web structure
  • Text summarization
  • Automatically created site search
  • Automatic completion of search keywords
architecture
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
slide6
Navigation/Viewing

Navigation

Viewing

Navigation

Viewing

Browsing Patterns

  • A conventional Browser
  • Power Browser
slide8
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
challenges
Challenges
  • Effective gestures
  • Animation timing
  • How many letters to wait for
  • Which site portions to crawl incrementally
status
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)
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