Bouncing your leg rhythmically improves cognition if it keeps you focused on your material instead of wishing you could be elsewhere, moving in another way, and therefore distracting you from your text. Your focus on your text and processing that text contribute to improved cognition. Whatever helps -- do it.

If you want to improve your cognition, start jumping rope. Aim to improve the number of times you skip rope without tripping the rope -- and improve by at least 1 count every day. Keep a chart. You will see that as your jumprope ability increases, your cognitive ability will also increase. I don't know if it is a 1:1 correlation, or even a causation. I do know there is some correlation because I have seen it in every one of my students.

"So why do kids with ADHD fidget and wiggle and run and jump and bounce and scream and play so much? Kids with ADHD are understimulated, which means that their thresholds are so high, that the stimuli in their environment does not cause them to release enough neurotransmitters to fit into all the necessary receptor sites. Messages don't pass from one neuron to another as easily as they do for those of us without ADHD. Their thresholds are high. Kids with ADHD fidget and squirm in order to provide extra stimulation, which translates into more keys fitting into more locks, and they can pass messages efficiently. Ever studied something intensely and then noticed that your leg was bouncing? Same thing. You were bouncing your leg to stimulate yourself and send a sufficient number of neurotransmitters into the synapse. When kids have to stimulate themselves, it can be hard on everyone around them, since this translates into bouncing off the walls."

When Microsoft introduced the dictation feature in windows vista they demoed it on stage and it went terribly wrong.

Who could forget bill gates and the very public blue screen of death. I believe this was demoing the USB plug and play feature of windows 98, aptly renamed to plug and pray for a period of time :)

They could have used my e-mail accounts to gain access to my online banking, or financial services. They could have used them to contact other people, and socially engineer them as well. As Ed Bott pointed out on TWiT.tv, my years as a technology journalist have put some very influential people in my address book. They could have been victimized too. Instead, the hackers just wanted to embarrass me, have some fun at my expense, and enrage my followers on Twitter by trolling.

I bought into the Apple account system originally to buy songs at 99 cents a pop, and over the years that same ID has evolved into a single point of entry that controls my phones, tablets, computers and data-driven life. With this AppleID, someone can make thousands of dollars of purchases in an instant, or do damage at a cost that you can’t put a price on.

 Get 10 percent of the homes in your area to sign up for service — it takes a $10 deposit — and Google will eventually hook you up. • Meet that quota by Sept. 9, or the network will fly around you. And if Google does come to your neighborhood, you’ll have just once chance for installation.

The State of America’s Libraries Report for 2011 notes that library visitation per capita and circulation per capita have both increased in the past 10 years.

“In general, libraries embraced the internet right away,” says Raphael. “And not just to provide computers for patrons. They recognized that it became a new tool for librarians.”

All of which suggests that close to 300,000 people could have just seen their personal, non-Yahoo e-mail accounts compromised as well as their Yahoo accounts.

To be on the safe side, if you have a Yahoo ID, you should assume it's no longer secure and change its password. (I just did, and I've never visited Yahoo's contributor-network site until today.) Yahoo is also changing the passwords of affected users. You should, however, also change other passwords if: You've used the same password for any other major service -- particularly for sensitive accounts such as banking, investing, or e-mail. You've ever signed into Yahoo or Associated Content with a non-Yahoo e-mail address.