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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 l.jpg

Power Browser Project

Orkut Buyukkokten

Hector Garcia-Molina

Andreas Paepcke

The Stanford Digital Library


Access to digital libraries from anywhere l.jpg
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 l.jpg
Challenges of PDA Platform

  • Small display

  • Limited input modalities (Pen input is slow)

  • Slow CPU

  • Battery lifecycle

  • Small memory

  • Limited bandwidth


Four key ideas l.jpg
Four Key Ideas

  • Special browser to take advantage of Web structure

  • Text summarization

  • Automatically created site search

  • Automatic completion of search keywords


Architecture l.jpg
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 l.jpg

Navigation/Viewing

Navigation

Viewing

Navigation

Viewing

Browsing Patterns

  • A conventional Browser

  • Power Browser



Slide8 l.jpg

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 l.jpg
Challenges

  • Effective gestures

  • Animation timing

  • How many letters to wait for

  • Which site portions to crawl incrementally


Status l.jpg
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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