On 8/9/2014 12:26 PM, Dennis Lee Bieber wrote:
On Sat, 09 Aug 2014 14:01:53 -0700, luofeiyu <elearn2...@gmail.com>
declaimed the following:
I want to write a program to help my teacher to take attendence.
There are 300 students in a big room,everyone has android phone.
I have matched them with my pc in win7 .
when all of them seated on the classroom,
As soon as I learned someone was using bluetooth presence to determine
I was in such a class -- I'd turn the bluetooth feature off!
And if attendance was part of your grade?
Actually, I agree with you and Steven that the premise that all have an
android phone, with battery charge, turned on, with bluetooth enabled,
is a bit dubious. At the Univesity of Delaware, students buy a
'clicker', about $20, with an ID (I presume) and a few buttons for
answering pop quizzes. I can only guess that they use bluetooth, but
with extremely limited function and probably no writable memory, power
draw is minimal and hijacking not an issue.
--
Terry Jan Reedy
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