Posted by: [na] on: November 11, 2009
This is the first wednesday of this semester (discounting the wednesday spent in Sydney during recess week) when I don’t have back to back tutorials from 9am – 2pm. It feels liberating to be able to have my own table at the Deck, overlooking the…oh wait, I can no longer see the sea because the construction of another building in NUS is blocking my view. The breeze has also be re-routed so…it is not as enjoyable/cooling sitting here. Meeting Kish for lunch in a bit and I’m absolutely not hungry because I just had breakfast a short while ago.
Have two more essays to complete before full-fledged mugging for exams can start. Am looking forward to ending this semester on a higher note. I got introduced to Wired Discovery by Mr Lim’s blog and found it an entirely interesting read! Here is what I thought was quite cool:
Breathing
Detection range// 100 feet
Emission// Sound
Signature// 10 to 25 decibels
Detection device// Parabolic microphone
Respiration
Detection range// Varies by concentration
Emission// Exhaled gases
Signature// Carbon dioxide, hydrogen sulfide, ammonia
Detection device// Gas-sensing semiconductors
Body Odor
Detection range// 50 feet
Emission// Secreted chemicals
Signature// Ammonium chloride
Detection device// Chemical-sniffing apparatus
Brain Waves
Detection range// 3 mm
Emission// Electrical activity
Signature// Amplitudes up to 200 microvolts, frequency of 1 to 30 Hz
Detection device// Electric-potential sensor
Heartbeat
Detection range// 16 inches
Emission// Electrical activity
Signature// Amplitudes mainly between 0.5 and 3 millivolts
Detection device// Electric-potential sensor
November 12, 2009 at 5:56 pm
well, jpd’s essay certainly left you on a somewhat higher note