Thursday, June 30, 2011
"Acoustic cloak to hide ships from sonar":
"Invisibility cloaks" have been in the news since 2006, when scientists proposed that they could design synthetic materials that would bend light in ways that made the objects under them appear invisible. Three years ago, Steve Cummer at Duke University figured out that the same principle could be applied to sound waves, and his lab has now brought out their first physical proof of the idea.
Update on the mathematics of the Rubiks' Cube.
In particular MIT computer scientist Erik Demaine and colleagues have shown:
In particular MIT computer scientist Erik Demaine and colleagues have shown:
...[T]hat the maximum number of moves required to solve a Rubik's cube with N squares per row is proportional to N^2/log N. “That that’s the answer, and not N^2, is a surprising thing,” Demaine says.(Via Reid A.)
Wednesday, June 29, 2011
"ShouldIChangeMyPassword.com has been created to help the average person check if their password(s) may have been compromised and need to be changed."
("This site uses a number of databases that have been released by hackers to the public. No passwords are stored in the ShouldIChangeMyPassword.com database.")
("This site uses a number of databases that have been released by hackers to the public. No passwords are stored in the ShouldIChangeMyPassword.com database.")
Off topic: The 6/29/2011 edition of PajamasMedia has just published my latest OpEd, "Why the 'Unexpected' Keeps Happening".
Tuesday, June 28, 2011
Monday, June 27, 2011
The Wall Street Journal asks Ray Kurzweil, "When will man merge with machines?"
"WSJ's Andy Jordan talks with futurist Ray Kurzweil about what he fears in terms of technology, why he thinks humans will one day live forever, what the job of the future is, and even what post-"singularity" sex will be like."
"WSJ's Andy Jordan talks with futurist Ray Kurzweil about what he fears in terms of technology, why he thinks humans will one day live forever, what the job of the future is, and even what post-"singularity" sex will be like."
Searle discusses Damasio on consciousness: "How do neurobiological processes in the brain cause consciousness?"
(Amazon link to Damasio's book, Self Comes To Mind: Constructing the Conscious Brain.)
(Amazon link to Damasio's book, Self Comes To Mind: Constructing the Conscious Brain.)
Sunday, June 26, 2011
Thursday, June 23, 2011
Wednesday, June 22, 2011
Tuesday, June 21, 2011
Off topic: The 6/20/2011 TownHall.com has published my latest OpEd, "A Doctor Exposes Obama's Health Care Fallacy".
My theme is that the proposed Accountable Care Organizations (ACOs) merely represent the latest incarnation of the age-old "central planner fallacy" as applied to American health care.
My theme is that the proposed Accountable Care Organizations (ACOs) merely represent the latest incarnation of the age-old "central planner fallacy" as applied to American health care.
Monday, June 20, 2011
"Physicists in Singapore and Norway have been able to copy a secret quantum key without revealing their presence to either sender or receiver."
Sunday, June 19, 2011
"This is the coolest science experiment you'll see all week". Nice demonstration of laminar flow!
The apparatus, called a "Couette Cell," was developed by John DeMoss and Dr. Kevin Cahill, and uses dyed corn syrup to demonstrate how a fluid with a sufficiently low Reynolds number will flow along distinct paths in parallel layers (like fanning a deck of cards), thereby preventing disruption of the fluid.
Thursday, June 16, 2011
The Gomboc is the world's only artificial, self-righting shape:
The Gömböc doesn't have any power, and is a consistent weight all the way through. It has a wide curve on the bottom, surrounded by flat-ish sides and a ridged curve of a top. No matter how it's placed on a flat surface, it will right itself. It's what's called a mono-monostatic shape, and was born of mathematical theory. The theory stated that a self-righting shape was possible, and that it had one stable point of balance, and one unstable point.
Placing it on the curve on its top will let it pick itself up quickly. Placing on its flat side starts a slower process. It rolls back and forward slowly, then slows almost to a stop, then rolls back and forward quickly in a tiny vibrating motion, and then falls onto its stable point of balance, righting itself again.
"Scientists Create Tiny Artificial Brain That Exhibits 12 Seconds of Short Term Memory". (Via BBspot.)
Wednesday, June 15, 2011
Tuesday, June 14, 2011
Interesting podcast on political themes in Firefly and Serenity.
If you prefer to read it rather than listen to the audio, here's the transcript (PDF).
If you prefer to read it rather than listen to the audio, here's the transcript (PDF).
Sunday, June 12, 2011
"The Cost of Hard Disk Space Has Decreased by Almost 1.5M Times Since 1980". Lots more details here.
Giant version of Digi-Comp II, huge automatic mechanical computer that uses billiard balls instead of marbles. Of course, there's a video!
It doesn't yet run Linux. (Via Waxy.)
It doesn't yet run Linux. (Via Waxy.)
Saturday, June 11, 2011
"Entrepreneur Creates World's Lightest, Strongest Steel – In Less Than 10 Seconds"
Quick -- let's regulate it, before people start using it!
Quick -- let's regulate it, before people start using it!
Thursday, June 09, 2011
"The 10 Most Memorable '80s TV Theme Songs".
I must admit to always liking the Hill Street Blues intro. Don't click through if you don't want one of these stuck in your head for an hour...
I must admit to always liking the Hill Street Blues intro. Don't click through if you don't want one of these stuck in your head for an hour...
Tennessee law bans posting images that "cause emotional distress".
What could possibly go wrong with this kind of law?
What could possibly go wrong with this kind of law?
Wednesday, June 08, 2011
Classic article: "How to use game theory to buy a car".
Here's the essence of the technique:
Here's the essence of the technique:
So here’s what you should do. Research the car carefully on the internet and decide exactly what you want.(Via Eric Barker.)
Determine the colour, the extras, everything. Then, call every dealer within, say, a 20-mile radius.
When they answer, tell them exactly the car that you want. Then inform them that you are calling all the dealers in the area and asking about the same car.
You are going to buy the car at 5pm from the dealership offering you the best deal. You will ring back soon and seek a price — the full price, with nothing at all left to be added on later.
The dealer may object that if he gives you a quote over the phone, the next dealer will just come in £50 lower. You simply tell him that, yes, this might indeed happen.
That is why, you explain, he has to give you the very lowest price he humanly can, so as to avoid anyone underbidding with a price the dealer would have been willing to accept.
When the witching hour arrives, you go to the dealer with the best offer, cheque in hand, and pick up your car. If there is any change in the terms, you go to the second-best showroom, although this shouldn’t be necessary.
What has happened here? You have forced the salesman to provide you, in the form of his lowest price, all the information he has about the real cost of the car. The advantage has moved from the dealer to you.
Tuesday, June 07, 2011
Update on the classic double-slit experiment.
Yes, the universe is still "stranger than we can imagine".
Yes, the universe is still "stranger than we can imagine".
Timewaster of the day: The actor/director career trajectory plotter.
Towards the bottom of the page. Film geeks will love it. (Via MR.)
Towards the bottom of the page. Film geeks will love it. (Via MR.)
Monday, June 06, 2011
Apparently 41% of winning bids on eBay for Amazon gift certificates exceeded the face value.
In other words, people were quite willing to overpay on eBay for something they could easily purchase at face value at the Amazon site itself.
In other words, people were quite willing to overpay on eBay for something they could easily purchase at face value at the Amazon site itself.
Birthing dolls. No, really.
I actually liked the zombie birthing doll the best. (Some images may be NSFW.)
I actually liked the zombie birthing doll the best. (Some images may be NSFW.)
Sunday, June 05, 2011
Our anti-matter containment now lasts up to 15 minutes. (Insert favorite Scotty quote from Star Trek.)
"France bans 'Facebook' and 'Twitter' from TV, radio":
Radio and television news anchors may no longer say the words "Facebook" and "Twitter" on air, unless the terms are part of a news story. This prohibits French news organizations from urging their audience to "follow us on Twitter" or "check out or Facebook page," or other such promotions.
The ban actually stems from a decree issued by the French government on March 27, 1992, which forbids the promotion of commercial enterprises on news programs. To sticklers of objective journalism, this may seem a reasonable rule. But as expat blogger Matthew Fraser points out, this type of regulation is absurd, especially when Facebook and Twitter have become so widely established in everyday life...
Saturday, June 04, 2011
Friday, June 03, 2011
Off topic: The June 2, 2011 edition of the Christian Science Monitor has published my latest health care OpEd, "Here comes Obamacare's Big Brother: Accountable Care Organizations".
Thursday, June 02, 2011
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