Information Technology Reference
In-Depth Information
When it is necessary to reorganize the display of a screen, it will in consequence be
necessary to anticipate transitions between the old organization and the new one.
For example, if it is necessary to add a new line between two previously displayed
lines, it is possible to very slowly move the lower part of the screen so as to
carefully make room for the necessary space, rather than bluntly switch from one
display to the next. If it is necessary to delete a line it is possible to progressively
reduce its size. Here we will be able to reuse animation techniques validated in the
field of Human-Computer Interaction. It would also be interesting to introduce
priorities between the information presented. Thus, the information relative to the
immediate departures or to the disappearance of people could appear first. Similarly,
priority could be given to users depending on what their subscription or their
handicap is.
The display of selected information according to the people present can raise
issues of respecting privacy. We have seen that our system aims to make a selection
from among many pieces of information. Consequently, if a single user is present in
a given place, an individual hidden in proximity can infer private information based
on a system's presentation, as he knows that it will only concern the user in
question. Let us remark that this problem disappears when two or three users are
present, if different information concerns them: it is then no longer possible to
attribute the presented information to such and such a person.
For example, let us presume that a monitor displays the destinations of the
travelers situated in proximity. If several people are present, the monitor will display
a few destinations, and it is not possible to infer anything about anybody. If a single
person is present, then only their destination will be displayed, which could be a
problem. To remedy this inconvenience, it is possible to introduce a “scrambling” of
information. In the aforementioned case, we can for instance decide that when fewer
than two or three relevant pieces of information are to be presented, one or two
additional pieces of information, which are random and non relevant, will also be
presented. This way, revealing information relative to a passenger who presents
himself alone in front of a screen is avoided.
10.10. Bibliography
[BAS
92]
B
ASS
L.,
F
ANEUF
R.,
L
ITTLE
R.,
M
AYER
N.,
P
ELLEGRINO
B.,
R
EED
S.,
S
EACORD
R.,
S
HEPPARD
S.,
S
ZCZUR
M., “A metamodel for the runtime architecture of an interactive
system”,
SIGCHI Bulletin
, vol. 24, no. 1, pp. 32-37, 1992.
[BEL
95]
B
ELLIK
Y., Interfaces Multimodales: Concepts, Modèles et Architectures, PhD
thesis, University of Paris-Sud 11, Orsay, France, 1995.
