Saturday, November 10, 2007

the meiteis

I just read an article hoping to learn more about the history of the Meiteis'the dominant community in Manipur' (being one myself)entitled Manipur: a case study of migration by By Dr Moirangthem Thawanthaba. Its very intriguing and the writer has written a lot of matter in a highly condensed form and i appreciate his work. Unfortunately for me, i didn't find what i was looking for like what happened before Cheitharol Kumbaba,the royal chronicle of Manipur was written which traces back to 33 A.D. , what happened before Pakhangba who was generally believed to be the first king of Manipur ,how different are the Meiteis from the 33 tribes of Manipur in originality.But its still an article worth reading for those Manipuris who are as much in the dark as i am about our history.If i find some answers about these questions i will update in my space here .In the meantime check out this article

the physics of electric guitars

I have always had this great passion for listening to electric guitars and have gone to the extent of even worshipping guitar Gods like Steve vai, Slash, Santana,
Joe Satriani even though i have never played an electric guitar.I still remember the first time i heard 'For the love of God' guitar solo by Steve vai.I must have heard that song more than 50 times that day.Being a student of science and technology understanding the physics of guitars apparently seems more easy to me than learning the electric guitar itself.So i did some queries here and there and this is what i assembled.
The idea of how the electric guitar works is very similar to phonographs and many other audio devices that have been around since the early 1900s if not the late 1800s. The idea is that a magnetic field is disturbed by something, be it the vibration of a string or the rough shape of the vinyl album, which is then translated by some device into sound.
The laws of physics governing electric currents and magnetic fields are not easily summed up, but knowing just a few is enough to understand how it all works.
When a string is plucked, the string oscillates. The oscillations then affect the flux of the magnetic field produced by the pick-up. Flux can be summed up as the amount of flow through a surface or region. So, therefore, the amount of flux, or flow of magnetic attractions are disturbed. Faraday's law states that when there is a change in the flux of a magnetic field, an electric field is produced. The oscillation of the string continually changes the flux of the magnetic field, therefore creating different patterns of electric fields which produce the current that flows through the wire to the amplifier, which then produces a sound wave with the frequency proportional to the current.
The actual current in a wire doesn't just flow in one direction, it actually flows in both, backwards and forwards. Current that comes from most normal wall outlets is alternating current. The name implies exactly that, the current alternates in direction. The oscillation in the string directly effects the rate at which the current alternates