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September 16, 2004
Mobile HCI 2004: Device Differences and Web Pages
A Study of Application and Device Effects Between a WAP Phone and a Palm PDA
Jiraporn Buranatrived, Paul Vickers
Ticket purchasing and stock broking interfaces designed for mobile phone and Palm OS
Written in J2ME and deployed onto both devices
Test with 16 subjects
Times were not significantly different for either application between devices
Task error not significantly different
Times compares favourably with FItt's Law predictions except stock broking on the phone, which took longer than predicted
(network delays, or trying to apply Fitt's Law to a mobile phone?)
*****
Personalization-based Optimization of Web Interfaces for Mobile Devices
Michael Hinz
Need personalised user interfaces addressing heterogeneous device capabilities
Media components (text, image, video)
content unit component (image with text caption)
document components (overview, chapters, content blobs)
different profiles for different adaptation scenarios
UAProf + session + user identity
creation of HTML layout managers, similar to Java systems
transformers for xhtml, chtml, wml
modelling mechanism to keep up to date user model
DELI + CDL4 learning
*****
Mixed-Initiative, Trans-Modal Interface Migration
Renata Bandelloni, Silvia Berti, Fabio Paternò
migratory interfaces
interface can transfer [information] amoung different platforms, allowing the user to continue interaction
task model
abstract user interface
platform specific implementation
*****
Web Page Transformation when Switching Devices
Bonnie MacKay
transformation approaches
direct migration - no change to web page (only allows a small piece of webpage to be shown on PDA)
Linear - create a long column of content, allowing just vertical scrolling. text and images reduce in size or even supressed
Gateway - fisheyes, overviews - zoom out from page to fit on screen
used BBC News as test site
already has a linear version created
gateway lowest for user preference, linear most preferred
tried expansion and blocking rollovers on gateway version, and increasing headline font size
*****
Mobile Context Aware Systems: the intelligence to support tasks and effectively utilise resources
Russell Beale
models of context
location, local environment, immediate stuff, environment plus task, plus user models plus technological models plus plus
context as a dynamic process with historic dependenies
context is comprised of a series of context states, like scenes in a movie
context as a movie
movies have overall direction and theme
many interacting subplots
scenes have shorter period, more focussed
props and actors are elements in a scene
individual frame captures instantaneous moment in time
context, context states and context substates
test art gallery scenario setup with ultrasonics, RFID and other location finding mechanisms
expose some of the context system to the user to show why things are changing and why info has been presented
navigation metaphor
context aware navigation of content is replacing the more familiar web browser metaphor (physical motion as navigation)
people appropriated movement to flick forwards and backwards
*****
Automatic Partitioning of Web Pages Using Clustering
Richard Romero
Nokia
segmenting content appropriate to the device you are using and the network you are using
desired properties
segments are large, relative to device and usability limitations (can't chunk on size)
look at the leaves of the DOM to work out how to break up the page
use a clustering technique incorporating both size and semantic relatedness
did user test to find out how people would break up a web page into a certain number of segments
algorithm did pretty well compared to user needs (users did not agree on chunking)
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