Environmental Engineering Reference
In-Depth Information
viewable area quadruples, so is the material used and the computing power needed. In
contrast, in the methods introduced in this article, the same two cameras or camera and
mirror combination can be easily scaled up or down to screens with different sizes and
height-width ratios.
4.
3D input
. As mentioned earlier in this article, the action space and virtual force can be
used to achieve the effect of 3D input and to obtain virtual force feedback.
5.
Multi-touch
. Existing computer software can easily detect and follow multiple image
features. It will be easy to include multi-touch functions. Combined with virtual force,
the multi-touch function can make inputting more versatile and powerful.
6.
Compact and light weight
. Comparing to the existing optical touch screen using
behind screen or user side camera, this side camera method is compact and can save
precious space. The cameras are generally small and will not increase the weight or size
of the computer display like many existing touch screens.
6.2 Benefit of the next generation CRS using touch screen writers
1.
Real-time feedback.
All educators are facing the perpetual challenge of assessing how
well the students understand each course, each example, or even each sentence.
Homework, quizzes and exams evaluate each individuals but with latency. Group
discussion, flash cards, and the original Classroom Response Systems (Clickers) provide
instant but collective feedbacks. The Z-Writer Group combines the benefits of the two
by providing instant individual feedbacks to the teachers.
2.
Progress monitor.
From one computer display, teachers can monitor not only the
answers but how the students proceed from start to finish at both collective and
individual levels.
3.
After-class evaluation.
Teachers can replay the writings of every answer after the class.
Therefore, they can analyze each student and address their specific needs with higher
accuracy.
4.
Open-ended questions.
Many in-class assessment tools rely on multi-choice questions,
which are not enough for STEAM subjects. The Z-Writer Group will enable teachers to
give open-ended questions in classes and obtain real-time feedbacks. This will greatly
encourage creativities from the students.
6.3 Future work
Currently we are working on improving the stability and noise reduction on the optical
touch screen algorithm and its use on classroom response system described in this paper.
We are also working on expanding the applications of the optical touch screen to art and
calligraphy field for paperless painting with realistic strokes. We are also exploring the use
of 802.11 for the auditorium size CRS settings.
7. References
Albinsson, P & Zhai, S. (2003). High Precision Touch Screen Interaction,
Proceedings of the
SIGCHI conference on Human factors in computing systems
, ISBN:1-58113-630-7, Fort
Lauderdale, FL, April 5-10, 2003
