We propose a simple yet effective controlled and
collaborative presentation system using tablet PCs for a
classroom or meeting room use. The system does not require the
Internet to be functioning, but simply needs a local Wi-Fi
connection via an access point. This makes our system invaluably
suitable for the classroom uses, especially in some rural parts of
the world where the Internet accesses are impossible. It allows a
presenter to synchronously change presentation slides of viewers
in the control mode where the presenter has the control of a
current page. The viewers, on the other hand, can get out of the
control mode and be in the edit mode where they can add
annotations or choose to view other pages asynchronously
different from the presenter. The viewers could choose some or
all of their annotations to be shared and shown to public through
the presenter. The presenter could select and allow any
annotations from the viewers to be shown on a projector’s screen.
This would help facilitate collaboration among the viewers. Each
viewer can save the presenter’s annotations, allowable other
viewers’ annotations and his annotations altogether in one file for
a further review or later use. The system had been evaluated on
three key aspects, including usefulness, user interface, and
performance, by 26 participants. On the usefulness, 81 percent of
the users agreed or strongly agreed with the system. On the user
interface, only 56 percent agreed or strongly agreed, while 64
percent agreed or strongly agreed on the system performance.
We propose a simple yet effective controlled andcollaborative presentation system using tablet PCs for aclassroom or meeting room use. The system does not require theInternet to be functioning, but simply needs a local Wi-Ficonnection via an access point. This makes our system invaluablysuitable for the classroom uses, especially in some rural parts ofthe world where the Internet accesses are impossible. It allows apresenter to synchronously change presentation slides of viewersin the control mode where the presenter has the control of acurrent page. The viewers, on the other hand, can get out of thecontrol mode and be in the edit mode where they can addannotations or choose to view other pages asynchronouslydifferent from the presenter. The viewers could choose some orall of their annotations to be shared and shown to public throughthe presenter. The presenter could select and allow anyannotations from the viewers to be shown on a projector’s screen.This would help facilitate collaboration among the viewers. Eachviewer can save the presenter’s annotations, allowable otherviewers’ annotations and his annotations altogether in one file fora further review or later use. The system had been evaluated onthree key aspects, including usefulness, user interface, andperformance, by 26 participants. On the usefulness, 81 percent ofthe users agreed or strongly agreed with the system. On the userinterface, only 56 percent agreed or strongly agreed, while 64
percent agreed or strongly agreed on the system performance.
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