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Caffeine: A User’s Guide to Getting Optimally Wired

Caffeine is the most widely used stimulant in the world, but few use it to maximal advantage. Get optimally wired with these tips.

1) Consume in small, frequent amounts. Between 20-200mg per hour may be an optimal dose for cognitive function. Caffeine crosses the blood-brain barrier quickly (owing to its lipid solubility) although it can take up to 45 minutes for full ingestion through the gastro-intestinal tract. Under normal conditions, this remains stable for around 1 hour before gradually clearing in the following 3-4 hours (depending on a variety of factors). A landmark 2004 study showed that small hourly doses of caffeine (.3mg per kg of body weight [approx 20 mg per hour; thanks digg!]) can support extended wakefulness, potentially by counteracting the homeostatic sleep pressure, which builds slowly across the day and acts preferentially on the prefrontal cortex (an area of the brain thought responsible for executive and “higher” cognitive functions).

You can improve your memory by learning memory techniques that are thousands of years old. That's what Nelson Dellis did to train for the USA Memory Championship, and you might know that Nelson has won the top prize for two years running. We have teamed up with Nelson to create this "Upgrade Your Memory" video that teaches memorization techniques that can enhance your business and personal life. Since we all have the same "hardware," it's really an upgrade of our "software," or brain, that makes all the difference.

years running. We have teamed up with Nelson to create this "Upgrade Your Memory" video that teaches memorization techniques that can enhance your business and personal life. Since we all have the same "hardware," it's really an upgrade of our "software," or brain, that makes all the difference. Fusion-io talked to Nelson to discuss the value of memory in our lives. Check out our interview with Nelson on the Fusion Blog: www.fusionio.com/blog/Follow us on Twitter: http://www.twitter.com/fusionioOr Like us on Facebook: http://www.facebook.com/#!/fusionio Category: Science & Technology Tags: Nelson Dellis upgrade your memory mental athlete USA Memory Competition USA Memory Championship USA Memory champion list memorization memorizing lists memory techniques Alzheimer's Climb for Memory Fusion-io fusionio fusion i/o Fusion IO @fusionio Licence: Standard YouTube Licence 261 likes, 3 dislikes Show more Show fewer Link to this comment: Share to:

In economics and contract theory, information asymmetry deals with the study of decisions in transactions where one party has more or better information than the other. This creates an imbalance of power in transactions which can sometimes cause the transactions to go awry, a kind of market failure in the worst case. Examples of this problem are adverse selection,[1] moral hazard, and information monopoly.[2] Most commonly, information asymmetries are studied in the context of principal–agent problems. In 2001, the Nobel Prize in Economics was awarded to George Akerlof, Michael Spence, and Joseph E. Stiglitz "for their analyses of markets with asymmetric information."[3]

Information asymmetry models assume that at least one party to a transaction has relevant information whereas the other(s) do not. Some asymmetric information models can also be used in situations where at least one party can enforce, or effectively retaliate for breaches of, certain parts of an agreement whereas the other(s) cannot.

In adverse selection models, the ignorant party lacks information while negotiating an agreed understanding of or contract to the transaction, whereas in moral hazard the ignorant party lacks information about performance of the agreed-upon transaction or lacks the ability to retaliate for a breach of the agreement. An example of adverse selection is when people who are high risk are more likely to buy insurance, because the insurance company cannot effectively discriminate against them, usually due to lack of information about the particular individual's risk but also sometimes by force of law or other constraints. An example of moral hazard is when people are more likely to behave recklessly after becoming insured, either because the insurer cannot observe this behavior or cannot effectively retaliate against it, for example by failing to renew the insurance.

Scientists Invent Particles That Will Let You Live Without Breathing

The invention, developed by a team at Boston Children's Hospital, will allow medical teams to keep patients alive and well for 15 to 30 minutes despite major respiratory failure. This is enough time for doctors and emergency personnel to act without risking a heart attack or permanent brain injuries in the patient.

"According to the World Health Organization, more than 1.2 million lives are lost every year in road traffic accidents. We believe our technology has the potential to cut that number, perhaps by as much as half."

he self-driving cars have now logged some 300,000 miles and "there hasn't been a single accident under computer control." (The New York Times did note in a 2010 article that a self-driving car was rear-ended while stopped at a traffic light, so Google must not be counting the incidents that were the fault of flawed humans.)

Google's cars would need to drive themselves (by themselves) more than 725,000 representative miles without incident for us to say with 99 percent confidence that they crash less frequently than conventional cars.

The Complete Patents of Nikola Tesla

Nikola Tesla, the "man who invented the twentieth century,"

He did emigrate and he did go to work for Edison, but for less than a year, until the fee promised for a particularly difficult project, redesign of an Edison dynamo, failed to materialize.

Coal Ash Is More Radioactive than Nuclear Waste By burning away all the pesky carbon and other impurities, coal power plants produce heaps of radiation

December 13, 2007

The popular conception of nuclear power is straight out of The Simpsons: Springfield abounds with signs of radioactivity, from the strange glow surrounding Mr. Burn's nuclear power plant workers to Homer's low sperm count. Then there's the local superhero, Radioactive Man, who fires beams of "nuclear heat" from his eyes. Nuclear power, many people think, is inseparable from a volatile, invariably lime-green, mutant-making radioactivity. Coal, meanwhile, is believed responsible for a host of more quotidian problems, such as mining accidents, acid rain and greenhouse gas emissions. But it isn't supposed to spawn three-eyed fish like Blinky. Over the past few decades, however, a series of studies has called these stereotypes into question. Among the surprising conclusions: the waste produced by coal plants is actually more radioactive than that generated by their nuclear counterparts.

The fact that no one knows the answer to this question is what makes it exciting. The story of physics has been one of an ever-expanding understanding of the sheer scale of reality, to the point where physicists are now postulating that there may be far more universes than just our own. Chris Anderson explores the thrilling implications of this idea.

animated exploration of the famous Fermi Paradox. Given the vast number of planets in the universe, many much older than Earth, why haven't we yet seen obvious signs of alien life? The potential answers to this question are numerous and intriguing, alarming and hopeful.

Using WiFi to see through walls

British engineers from University College London have developed a passive radar system that can see through walls using the WiFi signals generated by wireless routers and access points.

The passive radar process is actually quite simple. In any space that has WiFi, you are constantly being bombarded by 2.4GHz and 5GHz radio waves. When these waves hit a moving object, their frequency is altered (the Doppler effect). By carefully “sniffing” the WiFi signals, Woodbridge and Chetty are able to reconstruct an image any objects or humans that are moving on the other side of the wall.