Google Reader

what is Google reader?

Google Reader is a very useful and simple application that make it easy to you to be updated with the new posts, news and any update add to the sites you chosen that support Atom and RSSfeeds with your Gmail account.

In simple way if you followed some blogs or subscribed in RSS feeds you can see what is the new in these sites by Google Reader “all in one place” instead of check each site separately

Example

here you can access to your Google Reader

http://reader.google.com/

finally:

I hope this to help you in keeping you in touch with useful sites

USB 3.0 Finally Arrives ......

the world's best known computer peripheral interface "USB" came back with a major revamp !!

USB 3.0 aka SuperSpeed USB


improvement:

The theoretical throughput improvement offered by USB 3.0 is dramatic -- a theoretical 10X jump over existing USB 2.0 hardware. USB 2.0 maxed out at a theoretical 480Mbps, while USB 3.0 can theoretically handle up to 5Gbps*.

* note that:
the really maximum throughput for USB 2.0 could never goes close to 480Mbps, but it make data transfer at around 320 Mbps
and similarly for USB 3.0 it will never reach to 5 Gbps but the point is even half of this data rate will achieve almost 10x faster from USB 2.0

as PCWorld said:
The beauty of USB 3.0 is its backward compatibility with USB 2.0
you need a new cable and new host adapter (or, one of the motherboards that supports USB 3.0) to achieve USB 3.0, but you can still use the device on a USB 2.0 port and achieve typical USB 2.0 performance.

* Mbps "Mega Bit per Second" = 1/8 Mega Byte per second
so to convert 320 Mbps to M bytes per second 320/8 = 40 Mbyte per second

so with USB 3.0 the excepected data rate is 2.5 Gbps = 2.5/8 GByte per second = 312.5 MByte per second

312/40 ~= 8x faster !!

the max rate i achieved i think about 20 - 25 Mbyte per second



resources:
PCWorld

Melissa J. Perenson, PC World

Jan 11, 2010 6:57 am

Repair windows after unstalling ubuntu

if you installed ubuntu side by side with Windows
then you removed The Ubuntu OS you will not be able to access to your windows
and this because you now removed the boot loader (grub boot loader) so to repair your Windows OS just follow this steps

for Vista:
just insert your Vista CD and Choose repair

For XP :
insert XP CD and choose repair, you will asked to choose location to run DOS command from it usually C:\Windows
after the command prompt opens just write this single word FIXMBR

and restart your system, it should works ok now