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Messages - tariq

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76
Science Discussion Forum / Touchpad
« on: December 10, 2011, 05:08:43 PM »
In this era of science we are using many gifts of science in every aspects of our life but without understanding the basic thing "How they are working". A very common thing of today's world is touchpad that every laptop has for its proper use. But do we ever thing how this thing actually works? How our finger movement is understood and then used for different operations. It is basically the magic of electronics.
There are three ways a touch can be sensed
1. Capacitive
2. Resistive
3. Surface acoustic wave
Capacitive sensors are commonly used in laptop touchpads. Two layers of grid sense the change in capacitance at the point of touch and trace the movement of finger. A transducer creates an electric signal based on the movement which is fed into the system to move the cursor and to perform other operations.
Some links for more clear picture

http://computer.howstuffworks.com/question716.htm
http://www.ehow.com/how-does_5006535_a-touchpad-work.html       

77
Open Source Forum / Re: Google Summer of Code
« on: October 22, 2011, 05:14:01 PM »
Thank you.......

78
You are quite right. More over the exhaust of a cng engine is of higher temperature than normal gasoline engine. Again their exhaust quality is poorer than gasoline engine as the are basically converted to cng. All of these are making the city warmer and polluted.   

79
Telecom Forum / Re: Learn Android Application Development
« on: October 22, 2011, 04:43:33 PM »
Thank you sir............ its gonna be very interesting.....

80
Textile science, events, trade and issues / Fluid dynamics of needle
« on: October 22, 2011, 04:41:59 PM »
Fluid dynamics of sewing needle is becoming more and more important issue in modern textile research. The motion of high speed needle and yarn associated with it and their interaction with surrounding fluid(air) is becoming topic of prime interest. Its the portion where experts in fluid dynamics are contributing to produce more dynamic needles.   

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