Some time has been passed after I updated weblog last time! It ws unbelievably busy these days...
However, Winter vacation is coming soon! so I don't complain..
This year I will go for skiing to Alps so!!
I still have some topic about Brazil Series, but I will write about something else this time.
The Novel Prizer in 2007 was announced and ceremony was done!
This year, the prize in Physics was awarded to Albert Fert and Peter Grünberg, for their discovery of Giant MagnetoResistance (GMR).
In fact, this was the one of the topic in the course where I attended this Spring.
This phenomena was about the large (Giant) effect of external magnetic field on electric-resistance of certain nanoscaled materials.
This property was applied for reading head heads of harddisk drives. By following the changing of electric-resistance of this materials (which is at manufactured at the top of read heads in the case of hard disk drives), it is possible to read out the magnetically "written" information. Since read heads based on GMR realized more sensitive reading out of magnetic recording at the smaller area (than traditional Electromagnetic induction). Density of information per are of hard disks have been dramatically incresed!
This was the answer to my question why we can carrying a 20GB of musics and photos in your small iPod! (Surely there's many other developments of technology are contributing!)
I can remind that a hard disk of 120MB which I did use at my house 15 years ago was much bigger than iPod!
When I hear this kind of story, I feel science is not only interesting but also cool!
Today's song: "Heater" by Samim.
(comment on the song: the catchy melody of harmonica(?) with tricky rhythm makes you move body without noticing!)
