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i213: User Interface Design & Development. Marti Hearst Tues, April 19, 2007. Hardware Small mobile computers Sensor networks Tangible interfaces. Software / Systems Ubiquitous computing Context-aware computing Augmented Reality. Today: Alternative Interfaces. PDAs are everywhere!.

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i213 user interface design development

i213: User Interface Design & Development

Marti Hearst

Tues, April 19, 2007

today alternative interfaces

Small mobile computers

Sensor networks

Tangible interfaces

Software / Systems

Ubiquitous computing

Context-aware computing

Augmented Reality

Today: Alternative Interfaces
pdas are everywhere
PDAs are everywhere!
  • This is new … the first few attempts failed
  • Gary Trudeau lambasted the failed (ahead-of-its-time) Apple Newton (introduced 1993; Palm introduced 1996)
bergman haitani reading
Bergman & Haitani Reading
  • What assumptions did the Pilot designers change?
  • What went right with the Pilot?
  • What can we currently not do well on PDAs?
innovative pda based interfaces
Innovative PDA-based Interfaces
  • Ping Yee’s Peephole displays
      • http://www.ischool.berkeley.edu/~ping/peep/
  • Baudisch and Rosenholtz, Halo: A Technique for Visualizing Off-Screen Locations
    • http://www.patrickbaudisch.com/projects/halo/index.html
  • Datelens Fisheye Calendar
    • http://www.cs.umd.edu/hcil/datelens/
ubiquitous computing
Ubiquitous Computing
  • What are the main ideas in Weiser’s 1991 paper?
    • The disappearance of technology
      • The opposite of virtual reality
      • More humanizing, more human interaction
      • More “natural” interaction, less fiddling
    • Wireless, interconnected devices
      • Constant, but unobtrusive, availability
      • A range of different sizes
    • Context-aware behavior
      • Privacy considerations must be addressed – but no solutions proposed
      • This work really started several years before 1991. After more than a decade, we are not much closer to dealing with the privacy issues but at least now there is a lot of interest in the topic.
sensor networks
Sensor Networks
  • Berkeley/Intel sensor motes

Slide from lecture by Anind Dey

context aware computing
“Context-Aware” Computing
  • Related to Ubicomp and Mobile Computing
  • Takes your current environment into account in making decisions
    • Turns off cell phone when you enter the lecture hall.
    • When you ask where to go for a meal, notes that it is morning and you are in Taipei before making a recommendation.
    • Knows who wrote on the whiteboard so a copy of the ink can be emailed to the author.
    • Plays music you like when you enter an empty elevator.
    • Notifies your doctor when your heart rate goes too high.
context aware computing11
“Context-Aware” Computing
  • Makes use of different kinds of information
    • Geographic
    • Temporal
    • Social … ?
location aware computing
Location-Aware Computing
  • Motivation
    • location-based action
      • nearby local printer, doctor
      • nearby remote phone
      • directions/maps
    • location-based information
      • real
        • person’s location
        • history/sales/events
      • virtual
        • walkthrough
        • story of city
      • augmented
        • touring machine

Slide from lecture by Prasun Dewan

wearable pose aware computers
Wearable Pose-Aware Computers
  • Computers on body
    • track body relative movements
      • monitor person
      • train person

Slide from lecture by Prasun Dewan

alternative realities
Alternative Realities
  • Virtual Reality creates a completely computer-generated environment.
  • Augmented Reality uses an existing, real-life environment, and adds computer-generated information (virtual objects) thereto.
  • Diminished Reality filters the environment: it alters real objects, replaces them with virtual ones, or renders them imperceptible.
  • Mediated Reality combines Augmented and Diminished Reality.
    • Definitions by Steve “Cyberman” Mann
augmented reality
“Augmented Reality”
  • Operations based on locations and orientations of users and devices
  • Cool app:
    • Point a camera at a sign – see its translation on the screen.

Slide from lecture by Prasun Dewan

why tangible interfaces
Why Tangible Interfaces?
  • Lose something when we use a non-tactile, non-material interface
  • Tradeoffs between human touch and subtlety of expression vs. search for efficiency
  • Tangibility / physicality: humans reach for, children experience the world through
  • Some examples, not all leading to experiences, but meant as inspiration and fodder

Slide from lecture by Anind Dey

tangible interfaces
Tangible Interfaces
  • Merge physical with computational
  • Also called Phidgets
    • Physical Widgets
    • http://www.cpsc.ucalgary.ca/grouplab/phidgets/gallery/gallery.html
  • Getting closer to real applications


Slide from lecture by Jason Hong

tradeoffs of physical versus digital

represent all symbols

extremely flexible

quick to disseminate

cheap to reproduce

computational power


direct manipulation





Tradeoffs of Physical versus Digital
  • Bits + Physical => Tangibles?
    • can we get the best of both worlds?
    • good physical representations of abstractions?

Slide from lecture by Jason Hong

in summary
In Summary
  • Human-computer interaction is heading in many exciting, new directions.
  • Which ones will become part of our everyday lives?