Something Completely Different

by Michael Cain
(submitted by request)

A recent comment thread headed off into a discussion of the attractions of games and puzzles that involve combinatorial search, like Wordle or Sudoku or Freecell. Here's an example of a combinatorial puzzle. My daughter brought this home from math class when she was in eighth grade (long ago).

On the way home from work I stopped at the corner convenience store to pick up four items. The checkout clerk did things on the register and told me "$7.11, please."
"That seems too much. How did you calculate that?" I asked.
"I multiplied the four prices together."
"Aren't you supposed to add the prices?"
"Oh, right." After a moment he said, "Still $7.11."

What were the prices of the four items?

She told me the math teacher was explaining a technique he called guess and check: guess at the answer and check to see if it's correct. She thought it was stupid and clearly expected me to think the same. She was surprised when I said, "Cool! There's a whole bunch of neat math in there!" We talked about problems where you had to choose from a set of possibilities and had to find the right combination to solve the problem. That you often needed to find a clever strategy so you could find the right combination in a reasonable amount of time. We played around with this particular problem some, but didn't guess the right answer before it got tiresome. (No one else in the class guessed the right answer either.)

Some years after that I was working at an applied research lab that did lunch-time technical talks. I was asked to do one that had some math, some entertainment value, and that most of the staff would be able to follow. My recollection of the talk about the 7-11 problem is reproduced below the fold.

Oh, and open thread, because why not?

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We Can Haz Kitty Open Thread With No Guns!

by Gary Farber

One Thousand and One Nights of no Open Threads it has not been, but let one begin! 

Tell your stories! 

One Thousand and One Nights (Arabic: كتاب ألف ليلة وليلة‎ Kitāb 'alf layla wa-layla; Persian: هزار و یک شب Hezār-o yek šab) is a collection of Middle Eastern and South Asian stories and folk tales compiled in Arabic during the Islamic Golden Age. It is often known in English as the Arabian Nights, from the first English language edition (1706), which rendered the title as The Arabian Nights' Entertainment.[1]

The work as we have it was collected over many centuries by various authors, translators and scholars across the Middle East, Central Asia and North Africa. The tales themselves trace their roots back to ancient and medieval Arabic, Persian, Indian, Egyptian and Mesopotamian folklore and literature. In particular, many tales were originally folk stories from the Caliphate era, while others, especially the frame story, are most probably drawn from the Pahlavi Persian work Hezār Afsān (Persian: هزار افسان, lit. A Thousand Tales) which in turn relied partly on Indian elements.[2] Though the oldest Arabic manuscript dates from the 14th century, scholarship generally dates the collection's genesis to around the 9th century.

Let me frame that for you.  I foreshadow.  We are all unreliable narrators.

But some of us haz friends who are kitties.


 

Download We Can Haz Grooming Vid 2011-01-30 002

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One Way To Connect

by Gary Farber

ONE WAY TO CONNECT can be this:

This is America:

This is something we can do:

To Beat Back Poverty, Pay the Poor:

The city of Rio de Janeiro is infamous for the fact that one can look out from a precarious shack on a hill in a miserable favela and see practically into the window of a luxury high-rise condominium. Parts of Brazil look like southern California. Parts of it look like Haiti. Many countries display great wealth side by side with great poverty. But until recently, Brazil was the most unequal country in the world

Everything connects:

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A Periodic Table of Blog Commenters

By guest poster Gary Farber.

I don't have one of those.  Sorry. 

But, hey, it's Labor Day weekend, and so a post of silly or unusual links, and open-threadedness for all!

This first one you just have to trust me on: A Periodic Table Of Visualization Methods.  This sounds incredibly dull, but is immensely cool.  Check out the interactivity that a screen shot could barely hint at.

Don't like that one?  Use The Periodic Table Of Swearing.  (Should not be viewed by anyone offended by naughty words.  Really.)

(UPDATE: link fixed. Originally from Modern Toss.)

How about an actually useful Table Of Condiments and their spoilage?

The Periodic Table Of Candy.  The Periodic Table Of Awesoments.  (Hey, it's not my title.)  The Periodic Table Of Rejected Elements.  And finally, The Wooden Periodic Table Table

But we need more visualizations! A metrocontextual science map (original here), which is to say, in the form of a London Underground map.

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Why Argue On Blogs? The Dunning-Kruger Effect

by guest poster Gary Farber.

You're biased!

Of course you are.  We all are.  We can't think without basing our thinking on our past experiences and conclusions, and so we are led into all sorts of cognitive bias

Errol Morris had a brilliant series  in June on The Anosognosic’s Dilemma: Something’s Wrong but You’ll Never Know What It Is.

You should read Part 1, which includes the tale of the bank robber astonished to find that putting lemon juice on his face didn't make him invisible to cameras.

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Did the fathers of modern obstetrics murder more women than Jack the Ripper?

By Lindsay Beyerstein Latoya Peterson of Jezebel spotted this disconcerting story in Sunday's Guardian: They are giants of medicine, pioneers of the care that women receive during childbirth and were the founding fathers of obstetrics. The names of William Hunter and William Smellie still inspire respect among today's doctors, more than 250 years since they … Read more

The Big Bang Theory

Guest post by Gary Farber.  Gary’s home blog is Amygdala, and he invites you to read him there. 

For my final guest post at Obsidian Wings, something completely different: a roundup of some recent science, or tech, or just downright weird, sci-tech news, or that’s at least news to me, as well as an item or two of the fantastic.

Green your factories with electron beam particle accelerators:

[…] While environmental applications of particle accelerators have made little progress commercially in the United States in the last 40 years, a number of countries in Asia, Europe, and the Middle East are actively pursuing the technology.

In Daegu, Korea, an electron-beam accelerator in a textile factory removes toxic dyes from 10,000 cubic meters of wastewater per day. In Szczecin, Poland, the Pomorzany power station installed an electron-beam accelerator in its coal plant to simultaneously remove sulfur dioxides and nitrogen oxides from roughly 270,000 cubic meters of flue gas per hour. China has started to use electron beams to control air pollution, and a facility in Bulgaria is under construction. Saudi Arabia may soon follow.

All you have to do for more widespread use is ensmall them. 

[…] “We have proven that the technology works,” says Andrzej Chmielewski, director of the Institute of Nuclear Chemistry and Technology in Warsaw, Poland. “The size of the accelerators can be huge, though. We need a technological breakthrough” to make accelerators smaller and easier to maintain.

But they’re working on that!  With plasma wakefield acceleration and laser wakefield acceleration

Oh, and who do you have to thank for that?

[…] Thanks in great part to the American Recovery and Reinvestment Act, commonly known as the stimulus package,

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Live from the UN Summit on Climate Change

By Lindsay Beyerstein I'm posting from the UN Summit on Climate Change at UN HQ in New York. I'm wearing one of those special plastic translation earpieces. World leaders are here to talk face-to-face before the big climate negotiations to be held in Copenhagen in December. President Obama is scheduled to address this morning's opening … Read more

Swine Flu: What We Should Do for One Another

What follows is a guest post by Ruth A. Karron and Ruth R. Faden. Ruth A. Karron is the director of the Center for Immunization Research and Johns Hopkins Vaccine Initiative at the Johns Hopkins Bloomberg School of Public Health.  Ruth R. Faden is the executive director of the Johns Hopkins Berman Institute of Bioethics. *** At … Read more

Swine Flu

by hilzoy From the Washington Post: "The World Health Organization rushed to convene an emergency meeting Saturday to develop a response to the "pandemic potential" of a new swine flu virus that has sparked a deadly outbreak in Mexico and spread to disparate parts of the United States. Health officials reported that at least eight … Read more

Animal Stories

by hilzoy Recently, we've learned that chimpanzees stockpile weapons in anticipation of future attacks. We've discovered that they not only use tools, but modify them to make them better. But macaques teaching their infants to floss? "Female monkeys in Thailand have been observed showing their young how to floss their teeth –using human hair. Researchers … Read more

Stem Cell Orders for Dummies (Like Me)

by publius In reading up on Obama’s stem cell decision, I got confused about what exactly it does.  This line, in particular, confused me (from the WSJ): The new policy won't affect federal laws that prevent the use of federal money to destroy human embryos. So while it will substantially broaden research opportunities on established … Read more

One More Reason Why I’m Glad I’m Not An Ant

by hilzoy From the New York Review: "Some ant species do not have queen ants in the strict sense. Instead, worker ants (which are all female) that have mated with a male ant become the dominant reproductive individuals. These are the gamergates, or "married workers," and their sex life can be brutal. In one species … Read more

Great News

by hilzoy Wonderful news from the New England Journal of Medicine (1, 2), summarized by FP Passport: Results of the latest malaria vaccine trials will be published today in The New England Journal of Medicine, and from the looks of it, the news is good–fantastic, in fact. “We are closer than every before to having … Read more

“Just Lowering My Risk Of Prostate Cancer, Heh Heh Heh…”

by hilzoy The BBC brings good news for guys: “Men could reduce their risk of developing prostate cancer through regular masturbation, researchers suggest. They say cancer-causing chemicals could build up in the prostate if men do not ejaculate regularly. And they say sexual intercourse may not have the same protective effect because of the possibility … Read more

Alex: RIP

by hilzoy From the NYT: “He knew his colors and shapes, he learned more than 100 English words, and with his own brand of one-liners he established himself in TV shows, scientific reports, and news articles as perhaps the world’s most famous talking bird. But last week Alex, an African Grey parrot, died, apparently of … Read more

Noted Without Comment

by hilzoy From the LATimes: “Exploring the neurobiology of politics, scientists have found that liberals tolerate ambiguity and conflict better than conservatives because of how their brains work. In a simple experiment being reported today in the journal Nature Neuroscience, scientists at New York University and UCLA show that political orientation is related to differences … Read more

Junk Science: DDT

by hilzoy

Yesterday, John Quiggin had a post on Crooked Timber that was very interesting. It concerns an idea I had been rather vaguely aware of, but hadn’t really focussed in on: that Rachel Carson and the environmentalist movement were responsible for the deaths of thousands, maybe millions, even “tens of millions” from malaria. This is completely untrue (I’ll say why below the fold), not that that has stopped people from saying that it is in places like the WSJ, the National Review Online, and even the US Senate.

As Quiggin notes, there’s a mystery about this, namely: where did it come from? It has all the hallmarks of a coordinated campaign — editorials placed in prominent newspapers, all citing the same dubious examples, for instance, and its very own website — but it’s not clear why anyone would undertake such a campaign.

“One of the great puzzles of the DDT myth has been that it appeared to arise from pure ideological animus against Carson and the environmental movement – DDT is not patented so there were no profits to be obtained from pushing it.”

So what’s up?

Well: I had started to try to piece the story together when I discovered that Tim Lambert had done it for me. So I’ll just quote him (though you should read the whole thing):

“So how did the “Rachel killed millions” claim get from lunatic fringe to mainstream?

Well, in 1998, the new Director-General of the World Health Organization, Gro Harlem Brundtland established the Tobacco Free Initiative to reduce death and disease caused by tobacco use. Since it would also reduce tobacco company profits, they used one of their favourite tactics: When an agency plans to take actions against smoking, tobacco companies pay third parties to attack the agency for addressing tobacco instead of some other issue. For example, when the FDA proposed to regulate nicotine, Philip Morris organized and paid for an expensive anti-FDA campaign of radio, television and print ads from think tanks such as the CEI.

So Philip Morris hired Roger Bate to set up a new astroturf group Africa Fighting Malaria and criticize the WHO for not doing enough to fight malaria. The key elements of AFM’s strategy:

“Simplify our arguments.
Pick issues on which we can divide our opponents and win. Make our case on our terms, not on the terms of our opponents – malaria prevention is a good example. …
this will create tensions between LDCs and OECD countries and between public health and environment.”

The simple argument they used to drive a wedge between public health and environment was that we had to choose between birds and people. That by banning DDT to protect birds, environmentalists caused many people to die from malaria.”

So, in a nutshell: the WHO was about to undertake an initiative that would have harmed the tobacco companies. The tobacco companies, in turn, hired shills to attack the WHO. They presumably hired some to attack the WHO’s tobacco initiative, but they also hired people to attack other things the WHO was doing in order to discredit it more generally. Thus, the attack on Rachel Carson.

***

Malaria prevention is incredibly important. For that matter, so is the WHO and its anti-tobacco initiative. This story shows the tobacco industry funding people to spread misinformation, not because they themselves have any interest in malaria and DDT, but just to sow confusion and skepticism about the WHO at a time when it was a threat to their interests.

This is a story of intellectual corruption. And it has real public costs. People need to be able to trust experts: the alternative is everyone having to develop his or her own expertise in everything. When people who should know better allow themselves to be paid to shill for industry, they undermine that trust. And that makes us all worse off.

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Chimpanzees Make Weapons

by hilzoy From the Washington Post “Chimpanzees living in the West African savannah have been observed fashioning deadly spears from sticks and using the hand-crafted tools to hunt small mammals — the first routine production of deadly weapons ever observed in animals other than humans. The multi-step spear-making practice, documented by researchers in Senegal who … Read more

Interesting Stem Cell Development

by hilzoy From the Washington Post: “A type of cell that floats freely in the amniotic fluid of pregnant women has been found to have many of the same traits as embryonic stem cells, including an ability to grow into brain, muscle and other tissues that could be used to treat a variety of diseases, … Read more

On The Uses And Abuses Of Game Theory For Life

by hilzoy Via Crooked Timber, an excellent study: The social norm of leaving the toilet seat down: A game theoretic analysis (pdf). From the intro: “The issue of whether the toilet seat should be left up or down after use seemingly generates a lot of passion among the parties concerned, however, scientific inquiries into the … Read more

One More Reason To Be Glad You’re A Mammal…

by hilzoy Via Unfogged, a story on sexual cannibalism. Becks couldn’t figure out what to excerpt, and I can see why; you should read the whole bizarre thing. However, a taste (as it were): “Male Australian redback spiders court females for up to eight hours by plucking the strands of their web. Once a male … Read more

The HPV Vaccine And The Christian Right

by hilzoy Yesterday the HPV vaccine was approved by the FDA. It is 100% effective against two strains of the Human Papilloma Virus that are responsible for 70% of cervical cancer cases, and two more that are responsible for 90% of cases of genital warts. (It hasn’t been approved yet for use in men and … Read more

Medical Malpractice and the Courts

–by Sebastian Useful data on medical malpractice costs in the court system is notoriously difficult to come by.  Much of the time the researchers totally ignore defense costs–which leaves an analysis of ‘payouts’ woefully inadequate because it assumes that a suit which doesn’t lead to a payout doesn’t have a cost to the doctor.  Other … Read more

And They Hadn’t Invented Novocaine…

by hilzoy From the NYT: “Man’s first known trip to the dentist occurred as early as 9,000 years ago, when at least 9 people living in a Neolithic village in Pakistan had holes drilled into their molars and survived the procedure. The findings, to be reported Thursday in the scientific review Nature, push back the … Read more

Pet Peeve #278

I have a pet peeve.  I really don’t like seeing statistics misused.  They are often subtle and tricky, so I suspect that most misuse is unintentional but it still irks me. I am especially annoyed when I come across a discussion that would otherwise be interesting but which relies on sketchy statistics.  I came across … Read more

Bird Flu Preparedness: Medicine

by hilzoy

This is (hopefully) the first in a series of posts on our government’s response to the threat of pandemic avian influenza. It focusses on what medications can be used to deal with bird flu, what we have done to stockpile these medications, and whether, as a result, we can expect them to be widely available. (Short answer: no.)

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Avian Flu

by hilzoy

Pfawdate

It’s Pandemic Flu Awareness Week, so I thought I’d write a Pandemic Flu Awareness Post. Actually, a couple of them. This one is on general background and a few hints for personal preparedness; the next one will be on governmental responses and related issues.

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Wrong, Wrong, Wrong.

by hilzoy The Seattle Times has run a series of stories (the main one is here, the rest are accessible from the sidebar) on doctors being paid by Wall Street analysts to talk about ongoing drug trials: “Doctors testing new drugs are sworn to keep their research secret until drug companies announce the final results. … Read more

Krauthammer On Stem Cells

by hilzoy

A few days ago, Katherine wrote and asked me what I thought of this piece about stem cells by Charles Krauthammer. When Katherine asks, I always try to answer; but what with one thing and another, I am only now getting around to it. I’m going to start with some minor quibbles with Krauthammer’s editorial before getting to the central issue.

Krauthammer’s basic point is this:

“Congress’s current vehicle for expanding this research, the Castle-DeGette bill, is extremely dangerous. It expands the reach for a morally problematic area of research — without drawing any serious moral lines.”

What moral line in particular does Krauthammer think should be drawn? One that would rule out this:

“The real threat to our humanity is the creation of new human life willfully for the sole purpose of making it the means to someone else’s end — dissecting it for its parts the way we would dissect something with no more moral standing than a mollusk or paramecium. The real Brave New World looming before us is the rise of the industry of human manufacture, where human embryos are created not to produce children — the purpose of IVF clinics — but for spare body parts.”

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Ivory-Billed Woodpecker Found!

I know this is not an ornithology blog, but trust me: this is extraordinary news. Science is reporting that an Ivory-Billed Woodpecker has been found in Arkansas, and has been photographed and videotaped. The photos and video are admittedly blurry and hard to make out (you can see some of them if you download the pdf from the link I gave, and more in the ‘Supporting Materials’.) But together with the sightings, they seem to be conclusive evidence that the Ivory-Billed Woodpecker is not, as we have thought for decades, extinct.

Look at it: isn’t it gorgeous?
Ib

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Karnak Penalty!…no, er, wait, maybe not…

–Edward Since I began blogging (eons ago, it seems) I’ve been accused of "mindreading" on countless sites. What seemed apparent enough to me to mention was often slammed by opponents as out-of-bounds. And although I’ve learned to appreciate that in this forum, it’s considered best to criticize only what someone has said or done and … Read more

Sure to Drive Creationists Nuts

Going on display at the University of Wisconsin-Madison tomorrow is what’s being billed as the world’s oldest object, estimated to be, get this, 4.4 billion years old: A tiny speck of zircon crystal that is barely visible to the eye is believed to be the oldest known piece of Earth at about 4.4 billion years … Read more

Scientific American: Big Enough To Admit Their Mistakes.

by hilzoy

Via Majikthise: Scientific American has published an editorial in which they say:

“There’s no easy way to admit this. For years, helpful letter writers told us to stick to science. They pointed out that science and politics don’t mix. They said we should be more balanced in our presentation of such issues as creationism, missile defense and global warming. We resisted their advice and pretended not to be stung by the accusations that the magazine should be renamed Unscientific American, or Scientific Unamerican, or even Unscientific Unamerican. But spring is in the air, and all of nature is turning over a new leaf, so there’s no better time to say: you were right, and we were wrong.”

The rest is below the fold.

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