Interactional challenges of mobile and ubiquitous computing devices
Mobile and Ubiquitous Computing
Sandy Gould s.gould@cs.bham.ac.uk
15th February 2021
Today
– Finishwhatwecouldn’tlastweek on context.
– Thinkmoreaboutthedesignof services to fit devices (e.g., shortlinks)
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Context awareness
Let’s think about this ourselves…
kahoot.it
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
❝Input engineering❞ Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Attendance
Access code: D86GN2RG
Interactional challenges of mobile and ubiquitous computing devices– Sandy Gould, University of Birmingham –21st January 2019
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Short links
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Character sets and mode switching
Lowercase Numbers UPPERCASE
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Design decisions are constrained by the need to have large sets.
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Here’s a short link from a popular service:
bit.ly/y7vB92e
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links of this kind are there?
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
https://dkrashen.github.io/combinatorics/images/partitions.png
How many possible links are there?
bit.ly/y7vB92e
123456789 10 abcdefghijklmnopqrstuvwxyz 26 ABCDEFGHIJKLMNOPQRSTUVWXYZ 26
62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62 × 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62 × 62 × 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62 × 62 × 62 × 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e 62 × 62 × 62 × 62 × 62 × 62 × 62
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
How many possible links are there?
bit.ly/y7vB92e
62×62×62×62×62×62×62 = 3,521,614,606,208
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Experiment
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021
Nine-character IDs (a-z)
• lwkd.uk/S9T7R4B –vs–
Seven-character
Winner! …
!
IDs (a-z, A-Z, 0-9)
lwkd.uk/yevyevyev
Notice anything about lwkd.uk?
Interactional challenges– Sandy Gould, University of Birmingham – 15th February 2021