Brain rewinds, makes itself fresh when you sleep

The Hindu A model of a brain. File photo 

 

Ever wondered why a good sleep makes you feel refreshed? It’s because during that time your brain “resets” itself to make it ready to learn and process more information when you wake up, scientists say.

And when you won’t get enough sleep, the brain cannot make itself ready for more and new information, making you an irritable and inefficient person, claimed the researchers from the University of Wisconsin-Madison.

Psychologist Giulio Tononi, who led the study, said brain wave activity is particularly strong during sleep -- a sign that the brain is “wiping out” unnecessary impressions.

The brain literally “unwinds” during sleep -- wiping itself clean in much the same way as a computer reboots, Tononi said.

“Sleep may be the price you pay so your brain can be plastic the next day,” he was quoted as saying by the Daily Mail.

Tononi’s pioneering research into sleep -- using human volunteers, rats, and computer simulations -- is considered to offer some of the first insights into the ‘purpose’ of sleep His understanding of the brain and how it “rewires” itself may also lead to a deeper understanding of what consciousness itself is.

His hypothesis is that sleep allows the brain to regroup after a hard day of learning by giving the synapses, which increase in strength during the day, a chance to damp down to baseline levels This is important because the brain uses up to 80 per cent of its energy to sustain synaptic activity.

Sleep may also be important for consolidating new memories, and to allow the brain to “forget” the random, unimportant impressions of the day, so there is room for more learning the next day.

This could be why the brain waves are so active during certain periods of sleep, Tononi said.

“While there may still be no consensus on why animals need to sleep, it would seem that searching for a core function of sleep, particularly at the cellular level, is still a worthwhile exercise,” he concluded.

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Marks obtained in CBSE exams cannot be given under RTI: HC

 

The Hindu Students are having a last minute preparation for CBSE X exam at a centre in Visakhapatnam. File photo 

 

In a significant ruling, the Delhi High Court has held that marks obtained by a student in CBSE board exam cannot be revealed under the transparency law as it would “defeat” the purpose of the new grading system.

The court set aside the verdict of a single judge bench and the Central Information Commission, which had asked the Central Board of Secondary Education to reveal marks obtained by a girl in her Class X board examination in 2010.

“We are unable to agree; we feel that the CIC as well as the learned single judge, by directing disclosure of ‘marks’, in the regime of ‘grades’ have indeed undone what was sought to be done by replacing marks with grades and defeated the very objective thereof.

“The objective, in replacing the marks with grades, as can be gathered from the documents on record, was to grade students in a bandwidth rather than numerically...,” a bench of Acting Chief Justice A.K. Sikri and Justice Rajiv Sahai Endlaw said.

Writing the judgement, Endlaw said the details of marks, obtained by the student in 10th board, cannot be termed as an “information” under the Right to Information Act as its disclosure would defeat the policy of awarding grades instead of marks.

Allowing the plea of CBSE, it said “no weightage can also be given to the plea of respondent (girl’s father) that the marks even if disclosed would not be used for any other purpose.

“The possibility of respondent and his ward, in securing admission and for other purposes, using the said information to secure an advantage over others cannot be ruled out.”

The apex transparency panel had allowed the plea of the student saying “since, the marks were available with the appellant (CBSE) and since none of the exemptions under the RTI Act were attracted to support the non disclosure thereof, the appellant was bound to and directed to provide the information sought.”

Aggrieved by the order, CBSE appealed to the single judge bench of the High Court which upheld the order of the CIC.

The CBSE then filed an appeal against the order before a division bench which allowed its plea that disclosure of the marks would dilute and defeat the grading system.

“We have already held above that disclosure of marks, which though exists with the appellant would amount to allowing play to the policy earlier prevalent of marking the examinees. Merely because the appellant/its examiners for the purpose of grading, first mark the students would not compel this court to put at naught or to allow full play to the new policy of grades,” it said.

Anil Kumar Kathpal, the father of the girl, had sought the details of the marks saying “this information will help me to identify her weak areas in studies and take timely action, so that she can pursue her career after Class XII.”

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CHANGE ANY WINDOWS USERS PASSWORD

This tweak gives a user the opportunity to use it for good or bad. It enables the user to re-password any account without having to know the existing password and also shows you every account that exists on the machine (even the ones that are hidden). This is a good tool to use if you forgot a password to say your administrator account and you needed to be logged into the admin account for any reason. 

>>To view all of the user accounts:

1) While logged onto the computer, click on Start>Run>and type in CMD. 
2) From the command prompt window, type in cmd net users 
This will show you every account that is made onto the computer whether it is hidden or not. 

To change an account password:
1) While logged into the computer to an account that has administrative rights, click on Start>Run>and type>>CMD>> 

2) Type in net user then the name of the account then * and press enter. heres an example: net user administrator * or net user "TRICKS GOD" * . Put the name in quotes if it contains spaces. 

3) From there it should ask for a new password. Type in your new password (type very carefully - the command window won't display what you type) and once more to confirm it. If you get the message that the command succeeded successfully you're all set!!

Courtesy : http://sapost.blogspot.in/

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How to "Delete administrator Password" without any Software

Method 1
 

Boot up with DOS and delete the sam.exe and sam.log files from Windows\system32\config in your hard drive. Now when you boot up in NT the password on your built-in administrator account which will be blank (i.e No password). This solution works only if your hard drive is FAT kind.

Method 2

Step 1. Put your hard disk of your computer in any other pc .
Step 2. Boot that computer and use your hard disk as a secondary hard disk (Don't boot as primary hard disk ).
Step 3. Then open that drive in which the victim’s window(or your window) is installed.
Step 4. Go to location windows->system32->config
Step 5. And delete SAM.exe and SAM.log
Step 6. Now remove hard disk and put in your computer.
Step 7. And boot your computer

Courtesy : http://sapost.blogspot.in/

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Sanchay-6.6.1-Patches-(090512) Reposted

All patches for Sanchay 6.6.1 up to 09.05.12 (9.4 mb). In this new Tool, option to select the required Patch folders is provided.

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