QUESTION 1: Solution
Consider the following scenario:
“Objects Identifier system (a mobile
application) is designed to help the blind and visually impaired users to
identify objects they encounter in their daily lives (e.g. Cup, Glass, plant or
any object).”
application) is designed to help the blind and visually impaired users to
identify objects they encounter in their daily lives (e.g. Cup, Glass, plant or
any object).”
You are required to:
a)
Choose a suitable combination of input and output devices to best support the intended interaction.
Choose a suitable combination of input and output devices to best support the intended interaction.
b)
What should be the features
of the input and output devices that help the blind people to work on the
given system?
What should be the features
of the input and output devices that help the blind people to work on the
given system?
c)
Explain the major
problems that the input and output devices solve.
Explain the major
problems that the input and output devices solve.
Note: You are
supposed to describe at least one input
and one output device for the intended
supposed to describe at least one input
and one output device for the intended
Solution Table:
Identify
the goals, sub-goals and operators involved in given problem
the goals, sub-goals and operators involved in given problem
QUESTION 2 SOLUTION:
“Open a File name (HCI-Notes) from D. drive
and Update the second paragraph of page no. 20 in a file”.
and Update the second paragraph of page no. 20 in a file”.
Use a
word processor to update a paragraph and note your actions, goals, sub-goals
and operators.
word processor to update a paragraph and note your actions, goals, sub-goals
and operators.
Answers:
Imagine
you have a document open and you are at some capricious position within it. You
furthermore necessaries to make a decision which operator are accessible and
what their pre-conditions are:
you have a document open and you are at some capricious position within it. You
furthermore necessaries to make a decision which operator are accessible and
what their pre-conditions are:
|
Operator
|
Preconditions/
actions |
Result
|
|
Update
paragraph |
Cursor at edit
of paragraph |
Update paragraph
|
|
Move_to_
paragraph |
Cursor anywhere in the document
|
Cursor moves in
document to start of the next paragraph |
|
Move_to_start
|
Cursor anywhere
in the document |
Cursor at start
of the document |
Goal:
Update
second paragraph in document.
second paragraph in document.
Looking
at the operators an palpable one to make your mind up this aspiration is update
paragraph which has the pre-condition ‘cursor at edit of paragraph’
at the operators an palpable one to make your mind up this aspiration is update
paragraph which has the pre-condition ‘cursor at edit of paragraph’
We therefore have a new sub-goal: move to paragraph. The pre-condition is ‘cursor anywhere in document’ (which we can meet)
cursor moves in document to start of the next paragraph .
cursor moves in document to start of the next paragraph .
We set up a new
sub- goal, move to start, with pre-condition ‘cursor anywhere in document’ and result ‘cursor at start of document’.
We can then apply move to paragraph and finally update paragraph.
sub- goal, move to start, with pre-condition ‘cursor anywhere in document’ and result ‘cursor at start of document’.
We can then apply move to paragraph and finally update paragraph.
