1. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.1 Chapter 8 : The Mobile Web Mobile computing. The i-mode service. M-commerce. Personalised news and learning resources. Mobile web broswers. Information seeking on mobile devices. Presentation of information on mobile devices. The navigation problem in mobile portals. Mobile search.

2. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.2 Mobile Computing Mobility supports “anywhere, anytime access”. Limitations of mobile devices pose challenging problems. Mobile users have a shorter attention span, and their information needs are different. Wireless markup language allows developers to deliver information to mobile devices.

3. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.3 I-mode Figure 8.1 : I-mode menu

4. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.4 M-commerce Is an extension of e-commerce. Potential is huge, need access to services including: email, messaging, web browsing, voice interface and location detection. Mobile portals can provide services.

5. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.5 Delivering Personalised News Figure 8.2 : Daily Learner adaptive news agent

6. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.6 Delivery of Learning Resources Figure 8.3 : Map in KnowledgeSea system

7. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.7 Mobile Web Browsers Figure 8.4 : Opera browser on mobile phone

8. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.8 Mobile Web Browsers Figure 8.5 : Pocket Internet Explorer

9. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.9 Information Seeking on Mobile Devices Need to reduce the following factors: –Text input (use alternative input modes). –Amount of displayed information (present summaries and reduce graphics). –Number of clicks to find information (through personalisation). –Amount of information delivered to device (store relevant information on the device).

10. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.10 Presenting Information on a Mobile Device Figure 8.9 : Google search on Palm devices

11. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.11 Presenting Information on a Mobile Device Figure 8.10 : Thumbnails and detailed views

12. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.12 The Navigation Problem in Mobile Portals Figure 8.13 : Typical navigation session

13. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.13 The Navigation Problem in Mobile Portals Figure 8.14 : Portal menu after personalisation

14. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.14 Mobile Search Figure 8.15 : Web search on mobile phone

15. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.15 Focused Mobile Search Figure 8.18 : Palm Pirate search interface

16. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.16 Personalised Mobile Search Only a few results can be displayed on a mobile device (4 on pda and 2 on phone) so they must be relevant. Use machine learning to learn the user’s profile. Results can be reranked according to the user’s preferences.

17. Mark Levene, An Introduction to Search Engines and Web Navigation © Pearson Education Limited 2005 Slide 8.17 Location-Aware Mobile Search Geographic properties of web pages must be determined. Geographic search must take the location into account – web pages whose location is closer should be ranked higher. A query may be global (find a recipe) or local (find a restaurant).