Archive for the ‘Science’ Category.

This Illusion Went Around A Few Weeks Ago, But It Is So Good I Am Sharing It In Case You Missed It

In the Absolutely Most Predictable Scientific Finding Ever, Solar Roads Are Found to Suck

Long-time readers know that solar roads are like catnip for me -- I can hardly think of a better example of a technology that makes absolutely no sense but gets so much passionate support and funding.  If you are not sure why, here is a primer on why they are predictably awful.

So it turns out that the solar roads I was sure would not work have actually now been built and... they don't work.

One of the first solar roads to be installed is in Tourouvre-au-Perche, France. This has a maximum power output of 420 kW, covers 2,800 metres squared and cost €5 million to install. This implies a cost of €11,905 per installed kW.

While the road is supposed to generate 800 kilowatt hours per day (kWh/day), some recently released data indicates a yield closer to 409 kWh/day, or 150,000 kWh/yr. For an idea of how much this is, the average UK home uses around 10 kWh/day.

The road's capacity factor – which measures the efficiency of the technology by dividing its average power output by its potential maximum power output – is just 4 percent.

In contrast, the Cestas solar plant near Bordeaux, which features rows of solar panels carefully angled towards the sun, has a maximum power output of 300,000 kW and a capacity factor of 14 percent. And at a cost of €360 million, or €1,200 per installed kW, one-tenth the cost of our solar roadway, it generates three times more power.

There is much more.  I am embarrassed to say that when I slammed solar roads all those years, I actually was missing an important problem with them:

Unable to benefit from air circulation, its inevitable these panels will heat up more than a rooftop solar panel too.

For every 1 degree Celsius over optimum temperature you lose 0.5 percent of energy efficiency.

As a result a significant drop in performance for a solar road, compared to rooftop solar panels, has to be expected. The question is by how much and what is the economic cost?

I will add this to the list, thanks.

When I write stuff like this, I get the same kind of mindless feedback that I get when I point out operational issues at Tesla, ie "you are in the pay of the Koch brothers" or "you have no vision."  Well, I am actually putting solar on my roof and will get (hopefully) 45,000 KwH per year, which is about a third of the energy they get from this road but installed for a bit over 1% of the cost of the road.  And the panels are all ideally angled and placed, they are up in the air with absolutely no shade on them at any time of the day, and they don't have any trucks driving over them.

An Interesting Map

There is a cottage industry in creating maps that cause one to look at the Earth in a different way.  The classic of this genre was the one with the southern hemisphere on top.

These usually do not do much for me, but I have to admit I really liked this map -- what the map of the world would look like if we lived in oceans (kind of the BLUE HADES view of the world if you read Charles Stross).  (source)

Never, Ever Trust A Science Story in Major Media like NBC

Most journalists become journalism majors because they had vowed after high school never, ever to take a math or science class again.  At Princeton we had distribution requirements and you should have seen the squealing from English and History majors at having to take one science course (I don't remember ever hearing the reverse from engineering majors).

It should not surprise you, then, that most media is awful at science journalism.  I held off making a comment on this for 3 days figuring it was a typo and they would quickly fix it, but apparently not.  This fits in well with my thesis that the art of sanity-checking numbers has been lost (I added the bold):

The space elevator is the Holy Grail of space exploration,” says Michio Kaku, a professor of physics at City College of New York and a noted futurist. “Imagine pushing the ‘up’ button of an elevator and taking a ride into the heavens. It could open up space to the average person.”

Kaku isn’t exaggerating. A space elevator would be the single largest engineering project ever undertaken and could cost close to $10 billion to build. But it could reduce the cost of putting things into orbit from roughly $3,500 per pound today to as little as $25 per pound, says Peter Swan, president of International Space Elevator Consortium (ISEC), based in Santa Ana, California.

LOL.  The planning for such a structure would cost more than $10 billion.  There is no way that a space elevator can be built for just 1/10 the price of a high speed rail line from LA to San Francisco.  Even at $10 trillion dollars, or 3 orders of magnitude more, I would nod my head and think that was a pretty inexpensive price.

Whether You Are "Allowed" To Discuss Genetic Variability Depends on Which Group You Are Studying

Quillette had an interesting article about a scientific paper, that was mostly a presentation of math and statistical tools, that was essentially suppressed, apparently because it does not fit with current social justice talking points.

In the highly controversial area of human intelligence, the ‘Greater Male Variability Hypothesis’ (GMVH) asserts that there are more idiots and more geniuses among men than among women. Darwin’s research on evolution in the nineteenth century found that, although there are many exceptions for specific traits and species, there is generally more variability in males than in females of the same species throughout the animal kingdom.

Evidence for this hypothesis is fairly robust and has been reported in species ranging from adders and sockeye salmon to wasps and orangutans, as well as humans. Multiple studies have found that boys and men are over-represented at both the high and low ends of the distributions in categories ranging from birth weight and brain structures and 60-meter dash times to reading and mathematics test scores. There are significantly more men than women, for example, among Nobel laureates, music composers, and chess champions—and also among homeless people, suicide victims, and federal prison inmates.

I am not an expert on this and don't really take a position on whether this is truly genetics or nurture, but it does tend to explain a lot of phenomena, like the distribution of boys vs. girls math SAT scores.

But some feminists and SJW's are deeply, deeply invested in the hypothesis that differences in representation of men vs. women in the top tiers of anything are entirely due to misogyny and patriarchy and other bad cultural and societal things (not sure how they explain disproportionate numbers of men in the bottom of distributions).  So a partial genetic explanation is not going to make them happy.  So:

But, that same day, the Mathematical Intelligencer’s editor-in-chief Marjorie Senechal notified us that, with “deep regret,” she was rescinding her previous acceptance of our paper. “Several colleagues,” she wrote, had warned her that publication would provoke “extremely strong reactions” and there existed a “very real possibility that the right-wing media may pick this up and hype it internationally.” For the second time in a single day I was left flabbergasted. Working mathematicians are usually thrilled if even five people in the world read our latest article. Now some progressive faction was worried that a fairly straightforward logical argument about male variability might encourage the conservative press to actually read and cite a science paper?

In my 40 years of publishing research papers I had never heard of the rejection of an already-accepted paper. And so I emailed Professor Senechal. She replied that she had received no criticisms on scientific grounds and that her decision to rescind was entirely about the reaction she feared our paper would elicit. By way of further explanation, Senechal even compared our paper to the Confederate statues that had recently been removed from the courthouse lawn in Lexington, Kentucky.

The interesting part to me is that I have heard a parallel theory of greater genetic variability applied to Africans, though from a different cause.  Rather than being a selectivity phenomenon, it is argued that because Africa is likely the original birthplace of humanity, every other group of people was started by essentially an African splinter group, made up of just a portion of the range of African genetics.  Thus on a global basis Africans should be disproportionately in the extremes -- tallest and shortest, smartest and dimmest, fastest and slowest, etc.

Interestingly (and I admit I am not active in this field so I may be missing something here) the general reaction to this seems to be almost celebratory -- look at all this genetic diversity, to go along with the cultural diversity, in Africa!

How Do You Know When That Psychology Study Won't Replicate?

This is a very good, very readable article about why many psychology studies don't replicate, though most of it is applicable to most any other field of research.   The author has four rules to keep in mind, and they are all good.  He looks at a number of studies that do not replicate to demonstrate how the rules work.  A sample:

This study is basically a p-hacking manual. They’re not even trying to hide it, instead describing in detail how, when a hypothesis failed to yield a p-value below 0.05, they tried more and more things until something publishable popped out by chance.

The Meteor Extinction Debate Looks A LOT Like the Climate Debate

This article about a skeptic of the dominant Alvarez meteor-extinction debate is quite interesting and worth a read.  Gerta Keller has had quite an interesting life.  But I will say I found it particularly fascinating comparing details here to the climate debate.  Here are a few example quotes that will seem very familiar to those who have watched the back and forth over global warming, particularly from the skeptic side:

Keller’s resistance has put her at the core of one of the most rancorous and longest-running controversies in science. “It’s like the Thirty Years’ War,” says Kirk Johnson, the director of the Smithsonian’s National Museum of Natural History. Impacters’ case-closed confidence belies decades of vicious infighting, with the two sides trading accusations of slander, sabotage, threats, discrimination, spurious data, and attempts to torpedo careers. “I’ve never come across anything that’s been so acrimonious,” Kerr says. “I’m almost speechless because of it.” Keller keeps a running list of insults that other scientists have hurled at her, either behind her back or to her face. She says she’s been called a “bitch” and “the most dangerous woman in the world,” who “should be stoned and burned at the stake.”

Nobel prize winner Alvarez sounds a bit like Michael Mann:

Ad hominem attacks had by then long characterized the mass-extinction controversy, which came to be known as the “dinosaur wars.” Alvarez had set the tone. His numerous scientific exploits—winning the Nobel Prize in Physics, flying alongside the crew that bombed Hiroshima, “X-raying” Egypt’s pyramids in search of secret chambers—had earned him renown far beyond academia, and he had wielded his star power to mock, malign, and discredit opponents who dared to contradict him. In The New York Times, Alvarez branded one skeptic “not a very good scientist,” chided dissenters for “publishing scientific nonsense,” suggested ignoring another scientist’s work because of his “general incompetence,” and wrote off the entire discipline of paleontology when specialists protested that the fossil record contradicted his theory. “I don’t like to say bad things about paleontologists, but they’re really not very good scientists,” Alvarez told TheTimes. “They’re more like stamp collectors.”

This sounds familiar, dueling battles between models and observations:

That the dinosaur wars drew in scientists from multiple disciplines only added to the bad blood. Paleontologists resented arriviste physicists, like Alvarez, for ignoring their data; physicists figured the stamp collectors were just bitter because they hadn’t cracked the mystery themselves. Differing methods and standards of proof failed to translate across fields. Where the physicists trusted models, for example, geologists demanded observations from fieldwork.

There is pal review

he said impacters had warned some of her collaborators not to work with her, even contacting their supervisors in order to pressure them to sever ties. (Thierry Adatte and Wolfgang Stinnesbeck, who have worked with Keller for years, confirmed this.) Keller listed numerous research papers whose early drafts had been rejected, she felt, because pro-impact peer reviewers “just come out and regurgitate their hatred.”

And charges that key data is not being shared to avoid it falling in the hands of skeptics

She suspected repeated attempts to deny her access to valuable samples extracted from the Chicxulub crater, such as in 2002, when the journal Nature reported on accusations that Jan Smit had seized control of a crucial piece of rock—drilled at great expense—and purposefully delayed its distribution to other scientists, a claim Smit called “ridiculous.” (Keller told me the sample went missing and was eventually found in Smit’s duffel bag; Smit says this is “pure fantasy.”)

Leading to a familiar discussion of scientific consensus

Keller and others accuse the impacters of trying to squash deliberation before alternate ideas can get a fair hearing. Though geologists had bickered for 60 years before reaching a consensus on continental drift, Alvarez declared the extinction debate over and done within two years. “That the asteroid hit, and that the impact triggered the extinction of much of the life of the sea … are no longer debatable points,” he said in a 1982 lecture.....

All the squabbling raises a question: How will the public know when scientists have determined which scenario is right? It is tempting, but unreliable, to trust what appears to be the majority opinion. Forty-one co-authors signed on to a 2010 Science paper asserting that Chicxulub was, after all the evidence had been evaluated, conclusively to blame for the dinosaurs’ death. Case closed, again. Although some might consider this proof of consensus, dozens of geologists, paleontologists, and biologists wrote in to the journal contesting the paper’s methods and conclusions. Science is not done by vote.

Modern Guide to Analyzing Complex Multivariate Systems

  1.  Choose a complex and chaotic system that is characterized by thousands or millions of variables changing simultaneously (e.g. climate, the US economy)
  2. Pick one single output variable to summarize the workings of that system (e.g. temperature, GDP)
  3. Blame (or credit) any changes to your selected output variable on one single pet variable (e.g. capitalism, a President from the other party)
  4. Pick a news outlet aligned with your political tribe and send them a press release
  5. Done!  You are now a famous scientist.  Congratulations.

A Trip Down Blog Memory Lane: 1800 Words on Why Steel Can Fail Without Melting

I was randomly browsing my blog history when I encountered a post from over 11 years ago when it was necessary to spend 1800+ words explaining why steel could still fail in the Twin Towers even when it did not actually melt.

Of late, Rosie [O'Donnell] has joined the "truthers," using her show to flog the notion that the WTC was brought down in a government-planned controlled demolition....

Rosie, as others have, made a point of observing that jet fuel does not burn hot enough to melt steel, and therefore the fire in the main towers could not have caused the structure to yield and collapse.  This is absurd.  It is a kindergartener's level of science.  It is ignorant of a reality that anyone who has had even one course in structural engineering or metallurgy will understand.  The argument made that "other buildings have burned and not collapsed" is only marginally more sophisticated, sort of equivalent to saying that seeing an iceberg melts proves global warming.  ...

Here is the reality that most 19-year-old engineering students understand:  Steel loses its strength rapidly with temperature, losing nearly all of its structural strength by 1000 degrees F, well below its melting point but also well below the temperature of burning jet fuel.

And on and on from there.  Seriously,  I know its hard to believe this was even necessary, but it was a serious charge by some of our intellectual betters in the entertainment industry.  Actually, it brings me a certain comfort in encountering this again -- maybe our public discourse is not really getting substantially stupider.  Maybe it has always been that way.

Look, I am not mocking you if you don't know the material properties of steel and how they change with temperature.   Odds are, in your jobs, you do not need to know anything about it.  What bothers me are the people who know nothing about these topics who speak with such certainty.  In some ways it seems to go past Dunning-Krueger,   People making these absolute pronouncements not only don't know anything about the topic, but many have actively avoided ever finding themselves in a classroom where the topic (or more accurately the mathematical and scientific foundations of the topic) might have been discussed.

It's not like I am totally immune to this.   Here are a few topics that I may have blogged about a few times years and years ago but now I won't touch because I know I don't understand them:

  • Central banking and monetary policy
  • Almost anything having to do with chemistry, including ocean acidification (or more accurately, reduced ocean alkalinity).  I even had an A in Organic Chemistry but it did not stick at all.
  • Literary criticism, except to say what I liked and I didn't like
  • Anything about certain performance-based crafts, like singing and acting, except to say which performances I did and did not enjoy
  • Ice hockey, horse racing, and soccer (which doesn't mean I don't enjoy watching them)
  • 80% of what Tyler Cowen writes about
  • Anything about music post-1985
  • Anything on cooking or food
  • Absolutely anything on wine

To the last point, I got invited to a wine tasting the other day.  Everyone was saying they tasted chicory or boysenberry or a hint of diatomaceous earth or whatever and I tasted .. wine.  Honestly I felt like a blind person sitting in on a discussion of the color wheel.  But I resist the temptation to scream that it is all just the emperor's new clothes -- I am sure the people around me can honestly taste differences that I can't.  I know I can taste differences in bourbon they cannot taste.  Good vodkas on the other hand, are a different matter.  Some day I am going to do a blind vodka tasting for my vodka-snob friends and see if they really can taste the difference.

Postscript I used to love the show Connections by James Burke.  He would start with something like the Defenestration of Prague and show a series of connections between it and, say, the invention of the telephone.  Perhaps you can see why I found it entertaining since I began a post about the structural strength of steel at different temperatures and ended it with whether good vodkas really taste different.

There are a lot of James Burke TV episodes on Youtube and I recommend them all.  Connections is recommended of course but I actually think his best series was season 1 of the Day the Universe Changed.  I believe this is episode 1.

Fourier Transforms

This is as good of an explanation as I have seen of what is going on in a Fourier Transform.  I have not seen this person's videos before but I will have to seek out others of his.

SpaceX Landing Two Falcon Heavy Boosters Side by Side -- Gorgeous

Y'all know I have a certain distaste for Elon Musk's rent-seeking, but as I have written before there is nothing much cooler than several billionaires competing at space travel.   The video below is of today's apparently succesful Falcon Heavy launch, but while the launch is as cool as always, what was really new and beautiful was the near simultaneous side by side landing of the two booster rockets.   Booster landing starts around the 36:30 minute mark.

I will say that Musk's promotional abilities do remind me sometimes of DD Harriman.

Topology Question

Is there some sort of metric for the complexity of a boundary like this one for PA Distric 7, among those invalidated in PA (in a decision the Supreme Court today refused to review)?

I keep wondering whether there is an objective standard we can set, rather just the sort of "I know it when I see it" one that everyone seems to use.

One way I can imagine testing is to do it Monte Carlo style by drawing a series of lines from one random point in the shape to another random point in the shape and calculating which percentage of the lines cross the boundary at least once.  That metric for a circle or a rectangle would be zero, but would be very high for this shape.

 

Dolphin Intelligence -- Simply Amazing

This has been shared around a lot but I was very impressed with dolphins following strategies of deferred gratification that some humans I know would be challenged by.

At the Institute for Marine Mammal Studies in Mississippi, Kelly the dolphin has built up quite a reputation. All the dolphins at the institute are trained to hold onto any litter that falls into their pools until they see a trainer, when they can trade the litter for fish. In this way, the dolphins help to keep their pools clean.

Kelly has taken this task one step further. When people drop paper into the water she hides it under a rock at the bottom of the pool. The next time a trainer passes, she goes down to the rock and tears off a piece of paper to give to the trainer. After a fish reward, she goes back down, tears off another piece of paper, gets another fish, and so on. This behaviour is interesting because it shows that Kelly has a sense of the future and delays gratification. She has realised that a big piece of paper gets the same reward as a small piece and so delivers only small pieces to keep the extra food coming. She has, in effect, trained the humans.

Her cunning has not stopped there. One day, when a gull flew into her pool, she grabbed it, waited for the trainers and then gave it to them. It was a large bird and so the trainers gave her lots of fish. This seemed to give Kelly a new idea. The next time she was fed, instead of eating the last fish, she took it to the bottom of the pool and hid it under the rock where she had been hiding the paper. When no trainers were present, she brought the fish to the surface and used it to lure the gulls, which she would catch to get even more fish. After mastering this lucrative strategy, she taught her calf, who taught other calves, and so gull-baiting has become a hot game among the dolphins.

Yet Again, Forgetting the Mix

I like reading Zero Hedge, though their laudable cynicism about government and financial markets sometimes edges into conspiracy theory.

Anyway, I wanted to highlight something in a post there today about BLS data.  Various writers at the site have claimed for years that government economic data is being manipulated.  I am not sure I buy it -- I distrust government a lot but am not sure their employees could sustain such a fraud over months and years.  And besides, once you manipulate data one time to juice some metric, you have to keep doing it or the metric just reverses the next month.   Corporations that play special quarter-end inventory games to increase reported sales learn this very quickly.  Where there are apparent errors, I am much more willing to assume incompetence than conspiracy.

The example this week is from the BLS payrolls data, and I will quote from the article and show their chart:

Another way of showing the July to August data:

  • Goods-Producing Weekly Earnings declined -0.8% from $1,118.68 to $1,109.92
  • Private Service-Providing Weekly Earnings declined -0.1% from $868.80 to $868.18
  • And yet, Total Private Hourly Earnings rose 0.2% from $907.82 to %909.19

What the above shows is, in a word, impossible: one can not have the two subcomponents of a sum-total decline, while the total increases. The math does not work.

Certainly this is an interesting catch and if I were producing the data I would take these observations as a reason to check my work.  But the author is wrong to say that this is "impossible".  The reason is that these are not, as he says, two sub-components of a sum. They are two sub-components of a weighted average.  Total private average weekly earnings is going to be the goods producing weekly average times number of goods producing hours plus service producing weekly average times the number of service producing hours all over the total combined hours.

From this I hope you can see that even if the both sub averages go down, the total average can go up if the weights change.  Specifically, the total average can still go up if there is a mix shift from service providing to goods producing hours, since the average weekly wages of the latter are much higher than the former.  I will confess it would have to be a pretty big jump in mix.  The percent goods producing hours would have to rise from 15.6% to almost 17%, which strikes me as a very large jump for one month.  So I am not claiming this is what happened, but people miss the mix changes all the time.  I had to explain it constantly back in my corporate days.   Another example here.

Squishy Words That Create Problems For Using Results of Scientific Studies

The IPCC AR4 summary report had this critical conclusion:

Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic GHG concentrations.[7] It is likely that there has been significant anthropogenic warming over the past 50 years averaged over each continent (except Antarctica)

I want to come back to this in a second, but here is a story the Bryan Caplan posted on his blog.  He is quoting from Tetlock and Gardner's Superforecasting

In March 1951 National Intelligence Estimate (NIE) 29-51 was published.  "Although it is impossible to determine which course of action the Kremlin is likely to adopt," the report concluded, "we believe that the extent of [Eastern European] military and propaganda preparations indicate that an attack on Yugoslavia in 1951 should be considered a serious possibility." ...But a few days later, [Sherman] Kent was chatting with a senior State Department official who casually asked, "By the way, what did you people mean by the expression 'serious possibility'?  What kind of odds did you have in mind?"  Kent said he was pessimistic.  He felt the odds were about 65 to 35 in favor of an attack.  The official was started.  He and his colleagues had taken "serious possibility" to mean much lower odds.

Disturbed, Kent went back to his team.  They had all agreed to use "serious possibility" in the NIE so Kent asked each person, in turn, what he thought it meant.  One analyst said it meant odds of about 80 to 20, or four times more likely than not that there would be an invasion.  Another thought it meant odds of 20 to 80 - exactly the opposite.  Other answers were scattered between these extremes.  Kent was floored.

Let's go back to the IPCC summary conclusion, which is quoted and used all over the place  (no one in the media ever actually digs into the charts and analysis, they just stop at this quote).  A few thoughts:

  1. This kind of conclusion is typical of team process and perhaps is a reason that large teams shouldn't do scientific studies.  We wouldn't have aspirin if 500 people all had to agree on a recommendation to allow it.
  2. Climate alarmists often claim "consensus".  Part of the way they get consensus is by excluding anyone who disagrees with them from the IPCC process and publication.  But even within the remaining core, scientists have vast differences in how they evaluate the data.  Consensus only exists because the conclusions use weasel words with uncertain meaning like "most"  and "significant"  (rather than a percentage) and "very likely" (rather than a probability).
  3. Is "most" 51% or 95%?  The difference between these two is almost a doubling of the implied temperature sensitivity to CO2  -- close to the magnitude of difference between lukewarmer and IPCC estimates.  Many skeptics (including myself) think past warming due to man might be 0.3-0.4C which is very nearly encompassed by "most".
  4. It may be that this uncertainty is treated as a feature, not a bug, by activists, who can take a word scientists meant to mean 51% and portray it as meaning nearly 100%.

For an example of this sort of thing taken to an extreme, arguably corrupt level, consider the original 97% global warming consensus survey which asked 77 scientists hand-selected from a pool of over 10,000 working on climate-related topics two questions.  Answering yes to the two questions put you in the 97%.  In the context of what was written above, note the wording:

That anything-but-scientific survey asked two questions. The first: “When compared with pre-1800s levels, do you think that mean global temperatures have generally risen, fallen, or remained relatively constant?”  Few would be expected to dispute this…the planet began thawing out of the “Little Ice Age” in the middle 19th century, predating the Industrial Revolution. (That was the coldest period since the last real Ice Age ended roughly 10,000 years ago.)

The second question asked: “Do you think human activity is a significant contributing factor in changing mean global temperatures?” So what constitutes “significant”? Does “changing” include both cooling and warming… and for both “better” and “worse”? And which contributions…does this include land use changes, such as agriculture and deforestation?

Good Lord, I am a hated skeptic frequently derided as a denier and I would answer both "yes" and be in the 97% consensus.  So would most all of the prominent science-based skeptics you have ever heard of.

 

Keeping Cocktails Cold Without Dilution

For many of you, this will be a blinding glimpse of the obvious, but I see so many dumb approaches to cooling cocktails being pushed that I had to try to clear a few things up.

First, a bit of physics.  Ice cubes cool your drink in two ways.   First and perhaps most obviously, the ice is colder than your drink.  Put any object that is 32 degrees in a liquid that is 72 degrees and the warmer liquid will transfer heat to the cooler object.  The object you dropped in will warm and the liquid will cool and their temperatures will tend to equilibrate.  The exact amount that the liquid will cool depends on their relative masses, the heat carrying capacity of each material, and the difference in their temperatures.

However, for all but the most unusual substances, this cooling effect will be minor in comparison with the second effect, the phase change of the ice.  Phase changes in water consume and liberate a lot of heat. I probably could look up the exact amounts, but the heat absorbed by water going from 32 degree ice to 33 degree water is way more than the heat absorbed going from that now 33 degree water to room temperature.

Your drink needs to be constantly chilled, even if it starts cold, because most glasses are not very good insulators.  Pick up the glass -- is the glass cold from the drink?  If so, this means the glass is a bad insulator.  If it were a good insulator, the glass would be room temperature on the outside even if the drink were cold.  The glass will absorb some heat from the air, but air is not really a great conductor of heat unless it is moving.  But when you hold the glass in your hand, you are making a really good contact between your drink and an organic body that is essentially circulating near-100 degree fluid around it.  Your body is pumping heat into your cocktail.

Given this, let's analyze two common approaches to supposedly cooling cocktails without excessive dilution:

  1. Cold rocks.   You put these things in the freezer and put them in your drink to keep it cold.  Well, this certainly will not dilute the drink, but it also will not keep it very cold for long.   Remember, the equilibration of temperatures between the drink and the object in it is not the main source of heat absorption, it is the phase change and the rocks are not going to change phase in your drink.  Perhaps if you cooled the rocks in liquid nitrogen?  I don't know.
  2. Large round ice balls.  There is nothing that is more attractive in my cocktail than a perfect round ice ball.  A restaurant here in town called the Gladly has a way of making these beautiful round flaw-free ice balls that look like they are Steuben glass.  The theory is that with a smaller surface to volume ratio, the ice ball will melt slower.  Which is probably true, but all this means is that the heat transfer is slower and the cooling is less.   But again, the physics should be roughly the same -- it is going to cool mostly in proportion to how much it melts.  If it melts less, it cools less.  I have a sneaking suspicion that bars have bought into this ice ball thing to mask tiny cocktails -- I have been to several bars which have come up with ice balls or cylinders that are maybe 1 mm smaller in diameter than the glass so that a large glass holds about an ounce of cocktail.

I will not claim to be an expert but I like my bourbon drinks cold and have adopted this strategy -- perhaps you have others.

  1. Keep the bottles chilled.   I keep Vodka in the freezer and bourbon and a few key mixers in the refrigerator.   It is much easier to keep something cool than to cool it the first time, and this is a good dilution-free approach to the initial cooling.  I don't know if this sort of storage is problematic for the liquor -- I have never found any issues.
  2. Keep your drinking glass in the freezer.  Again, it will warm in your hand but an initially warm glass is going to pump heat into whatever you pour into it.
  3. Use a special glass.   I have gone through two generations on this.  My first generation was to use a double wall glass with an air gap. This works well and you can find many choices on Amazon.  Then my wife found some small glasses at Tuesday Morning that were double wall but have water in the gap.  You put them in the freezer and not only does the glass get cold but the water in the middle freezes.  Now I can get some phase change cooling in my cocktail without dilution.  You have to get used to holding a really cold glass but in Phoenix we have no complaints about such things.

Things I don't know but might work:  I can imagine you could design encapsulated ice cubes, such as water in a glass sphere.  Don't know if anyone makes these.  There are similar products with gel in them that freezes, and double wall glasses with gel.  I do not know if the phase change in the gel is better or worse for heat absorption than phase change of water.  I have never found those cold packs made of gel as satisfactory as an ice pack, but that may be just a function of size.  Anyone know?

Update:  I believe this is what I have, though since we bought them at Tuesday Morning their provenance is hard to trace.  They are small, but if you are sipping straight bourbon or scotch this is way more than enough.

Postscript:  I was drinking old Fashions for a while but switched to a straight mix of Bourbon and Cointreau.  Apparently there is no name for this cocktail that I can find, though its a bit like a Bourbon Sidecar without the lemon juice.  For all your cocktails, I would seriously consider getting a jar of these, they are amazing.  The Luxardo cherries are nothing like the crappy bright red maraschino cherries you see sold in grocery stores.

After the "Science" March, We Will Do Some Science

Many of the folks who participated in the science march this weekend seem to have a view of science seem to have a definition of science that involves a lot of appeals to authority and creation of heretics.  Unfortunately, the video below relies on the old-fashioned cis-gendered white male definition of science, which involves using theory to establish hypotheses which are confirmed or denied through observation.  In this dated definition, there is no such thing as heresy in science.

Let me tell one of my favorite stories about scientific consensus.

Perhaps the most important experiment of the last 150 years was Michelson and Morley's interferometer study trying to measure the aether drift.  What is this?  Think of bullets fired from a moving airplane.  From the perspective of someone standing on the ground, bullets will initially travel much faster when fired forward rather than backwards, as the velocity of the plane is added (or subtracted) from the velocity with which they leave the gun.  Everyone, and I mean virtually everyone in the scientific community (WAY more than 97%) assumed the same happened with light.  M&M's hypothesis in their experiment was that light "fired" in one direction will travel at a different speed than light fired at a 90 degree angle to that, due to the Earth's movement through the universe, filled with some sort of aether (yet another of a long line of imponderable fluids proposed to explain various physical phenomena).   They found no such difference -- the speed of light was identical in every direction.   M&M has been called the most important negative result in the history of science.  Einstein and special relatively explained the result a few years later.

While we are on the topic, I want to mention something that always makes me crazy when you see popular articles about Einstein.  You will frequently see stories about Einstein being turned down for a promotion at the patent office or turned down for a teaching job or that he got bad grades.  The point of these stories is always something like, "ha, ha look how stupid these other folks were to give bad grades to the greatest mind of the 20th century."  But Einstein was never a great mathematician.  One always hears that relativity involves all this crazy math, and that is true for the later general relativity, but one can derive the basic equations for special relativity using nothing more than algebra and the Pythagorean theorem.  Seriously, I had to do it on a test when I was 17, it is not that hard.  Perhaps I will show it in a post one day if I am really bored.  Later, better mathematicians wrote papers cleaning up the math of special relativity and making it more robust, and later Einstein had to get a LOT of help with the non-Euclidean geometry involved in general relativity.

I believe (and this is a personal conclusion from reading a lot about him and not necessarily a widely held belief) that a lot of Einstein's greatness came from the fact that he had the mind of a rebel.  He was willing to consider things the science establishment simply would not consider.  It is STILL hard, even a hundred years later, for many of us laymen to accept that time is somehow non-absolute, that it changes depending on one's frame of reference -- so imagine how hard it was for someone in Einstein's time.  In the 19th century, the world of physics had become split into two worlds that folks had come to think of as incompatible and separate -- the world of physical objects governed by Newtonian physics, and the world of light and waves governed by Maxwell's equations.   Maxwell's equations implied light always had a fixed speed.  Everyone assumed this had to be fixed vs. some frame of reference.  The assumption of an aether or fixed point of reference against which light's speed was fixed was the 19th century solution for uniting these two worlds, but M&M demolished this.  It seemed that light had to be a fixed speed in every direction and every frame of reference.  Eek! Einstein asked himself how to explain this result, and thereby re-united Newtonian and wave physics, and he concluded the only way to do so was if time was variable, so he ran with that.  That is not an act of math, that is an act of a flexible, rebellious mind. And flexible rebellious minds do not do very well in schools and patent office bureaucracies.

 

Asking the Wrong Question

Apparently a chunk of what looks like manufactured aluminum was dug up years ago in Romania and was dated at up to 250,000 years old.  By this dating -- given the technology required to make aluminum -- it would be unlikely to be man-made.

So of course everyone is focusing on the question of whether it is an alien artifact.  Which is the wrong question.  A rational person should be asking, "what is it about this particular metallurgy or the way in which it was buried that is fooling our tests into thinking that a relatively new object is actually hundreds of thousands of years old?"  I would need to see folks struggle unsuccessfully with this question for quite a while before I would ever use the word "alien."  I am particularly suspicious of tests that have an error bar running between 400 years and 250,000 years.  That kind of error range is really close to saying "we have no idea."

Postscript:  The article hypothesizes that it looks like an axe head.  Right.  Aliens find some way to fly across light-years, defying much of what we understand about physics, and then walk out of their unimaginably advanced spacecraft carrying an axe to chop some wood, when the head immediately goes flying off the handle and has to be left behind as trash.

Uncertainty Intervals and the Olympics

If I had to pick one topic or way of thinking that engineers and scientists have developed but other folks are often entirely unfamiliar with, I might pick the related ideas of error, uncertainty, and significance.  A good science or engineering education will spend a lot of time on assessing the error bars for any measurement, understanding how those errors propagate through a calculation, and determining which digits of an answer are significant and which ones are, as the British might say, just wanking.

It is quite usual to see examples of the media getting notions of error and significance wrong.  But yesterday I saw a story where someone actually dusted these tools off and explained why the Olympics don't time events to the millionths of a second, despite clocks that are supposedly that accurate:

Modern timing systems are capable of measuring down to the millionth of a second—so why doesn’t FINA, the world swimming governing body, increase its timing precision by adding thousandths-of-seconds?

As it turns out, FINA used to. In 1972, Sweden’s Gunnar Larsson beat American Tim McKee in the 400m individual medley by 0.002 seconds. That finish led the governing body to eliminate timing by a significant digit. But why?

In a 50 meter Olympic pool, at the current men’s world record 50m pace, a thousandth-of-a-second constitutes 2.39 millimeters of travel. FINA pool dimension regulations allow a tolerance of 3 centimeters in each lane, more than ten times that amount. Could you time swimmers to a thousandth-of-a-second? Sure, but you couldn’t guarantee the winning swimmer didn’t have a thousandth-of-a-second-shorter course to swim. (Attempting to construct a concrete pool to any tighter a tolerance is nearly impossible; the effective length of a pool can change depending on the ambient temperature, the water temperature, and even whether or not there are people in the pool itself.)

By this, even timing to the hundredth of a second is not significant.  And all this is even before talk of currents in the Olympic pool distorting times.

Public Key Encryption

This video, linked by Tyler Cowen, is the best I have seen to simplify the basic theory of public key encryption:

This follow-up video takes this basic understanding and explains RSA encryption

The Science is Settled!

“Scientists have solid experimental and theoretical evidence to support…the following predictions: In a decade, urban dwellers will have to wear gas masks to survive air pollution…by 1985 air pollution will have reduced the amount of sunlight reaching earth by one half….”
• Life Magazine, January 1970

Other prediction fails from the first Earth Day here.

The New Rich -- Living the High Life Through Your Non-Profit

Several months ago, a lot of folks where shocked to find that the Clinton Foundation only spent $9 million in direct aid out of a total budget of $150 million, with the rest going to salaries and bonuses and luxury travel for family and friends and other members of the Clinton posse.

None of this surprised me.  From my time at Ivy League schools, I know any number of kids from rich families that work for some sort of trust or non-profit that has nominally charitable goals, but most of whose budget seems to go to lavish parties, first-class travel, and sinecures for various wealthy family scions.

But this week comes a story from the climate world that demonstrates that making a fortune from your non-profit is not just for the old money any more -- it appears to be a great way for activists to build new fortunes.

The story starts with the abhorrent letter by 20 university professors urging President Obama to use the RICO statute (usually thought of as a tool to fight organized crime) to jail people who disagree with them in a scientific debate.  The letter was authored by Jagadish Shukla of George Mason University, and seems to take the position that all climate skeptics are part of an organized coordinated gang that are actively promoting ideas they know to be wrong solely for financial enrichment. (I will give the near-universal skeptic reply to this:  "So where is my Exxon check?!"

Anyway, a couple of folks, including Roger Pielke, Jr. and Steve McIntyre, both folks who get accused of being oil industry funded but who in fact get little or no funding from any such source, wondered where  Shukla's funding comes from.   Shukla gets what looks like a very generous salary from George Mason University of $314,000 a year.  Power to him on that score.  However, the more interesting part is where he makes the rest of his money, because it turns out his university salary is well under half his total income.  The "non-profits" he controls pays him, his family, and his friends over $800,000 a year in compensation, all paid out of government grants that supposedly are to support science.

A number of years ago Shukla created a couple of non-profits called the Institute for Global Environment and Security (IGES) and the Center for Ocean Land Atmosphere Interactions (COLA).  Both were founded by Shukla and are essentially controlled by him, though both now have some sort of institutional relationship with George Mason University as well.  Steve McIntyre has the whole story in its various details.

COLA and IGES both seem to have gotten most of their revenues from NSF, NASA, and NOAA grants.    Over the years, the IGES appears to have collected over $75 million in grants.  As an aside, this single set of grants to one tiny, you-never-even-heard-of-it climate non-profit is very likely way higher than the cumulative sum total of all money ever paid to skeptics.   I have always thought that warmists freaking out over the trivial sums of money going to skeptics is a bit like a football coach who is winning 97-0 freaking out in anger over the other team finally picking up a first down.

Apparently a LOT of this non-profit grant money ends up in the Shukla family bank accounts.

In 2001, the earliest year thus far publicly available, in 2001, in addition to his university salary (not yet available, but presumably about $125,000), Shukla and his wife received a further $214,496  in compensation from IGES (Shukla -$128,796; Anne Shukla – $85,700).  Their combined compensation from IGES doubled over the next two years to approximately $400,000 (additional to Shukla’s university salary of say $130,000), for combined compensation of about $530,000 by 2004.

Shukla’s university salary increased dramatically over the decade reaching $250,866 by 2013 and $314,000 by 2014.  (In this latter year, Shukla was paid much more than Ed Wegman, a George Mason professor of similar seniority). Meanwhile, despite the apparent transition of IGES to George Mason, the income of the Shuklas from IGES continued to increase, reaching $547,000 by 2013.

Grant records are a real mess but it looks like from George Mason University press releases that IGES and its successor recently got a $10 million five-year grant, or $2 million a year from the government.  Of that money:

  • approximately $550,000 a year goes to Shukla and his wife as salaries
  • some amount, perhaps $90,000 a year, goes to Shukla's daughter as salary
  • $171,000 a year goes as salary to James Kinter, an associate of Shukla at George Mason
  • An unknown amount goes for Shukla's expenses, for example travel.  When was the last time you ever heard of a climate conference, or any NGO conference, being held at, say, the Dallas-Ft Worth Airport Marriott?  No, because these conferences are really meant as paid vacation opportunities as taxpayer expense for non-profit executives.

I don't think it would be too much of a stretch, if one includes travel and personal expenses paid, that half the government grants to this non-profit are going to support the lifestyle of Shukla and his friends and family.  Note this is not money for Shukla's research or lab, this is money paid to him personally.

Progressives always like to point out examples of corruption in for-profit companies, and certainly those exist.  But there are numerous market and legal checks that bring accountability for such corruption.  But nothing of the sort exists in the non-profit world.  Not only are there few accountability mechanisms, but most of these non-profits are very good at using their stated good intentions as a shield from scrutiny -- "How can you accuse us of corruption, we are doing such important work!"

Postscript:  Oddly, another form of this non-profit scam exists in my industry.  As a reminder, my company privately operates public recreation areas.  Several folks have tried to set up what I call for-profit non-profits.  An individual will create a non-profit, and then pay themselves some salary that is equal to or even greater than the profits they would get as an owner.  They are not avoiding taxes -- they still have to pay taxes on that salary just like I have to pay taxes (at the same individual tax rates) on my pass-through profits.

What they are seeking are two advantages:

  • They are hoping to avoid some expensive labor law.  In most cases, these folks over-estimate how much a non-profit shell shelters them from labor law, but there are certain regulations (like the new regulations by the Obama Administration that force junior managers to be paid by the hour rather than be salaried) that do apply differently or not at all to a non-profit.
  • They are seeking to take advantage of a bias among many government employees, specifically that these government employees are skeptical of, or even despise, for-profit private enterprise.  As a result, when seeking to outsource certain operations on public lands, some individual decision-makers in government will have a preference for giving the contract to a nominal non-profit.   In California, there is even legislation that gives this bias a force of law, opening certain government contracting opportunities only to non-profits and not for-profits.

The latter can have hilarious results.  There is one non-profit I know of that is a total dodge, but the "owner" is really good at piously talking about his organization being "cleaner" because it is a non-profit, while all the while paying himself a salary higher than my last year's profits.

The Problem with Elon Musk

When first presented with the idea of the Hyperloop (a train running in vaccuum in an underground tube), I was extremely skeptical it made any sense.   Sure it might work (after all the London tube started out as a pneumatic system much like those that older ones of us remember sending receipts around department stores).   But did it make any economic sense.  Was it really likely that, if we can't afford rail lines above ground easily, we could afford to build thousands of miles of air-tight large-diameter tubes?  Honestly, it looked to me like any other silly idea on the cover of Popular Mechanics, right next to the titanium zeppelin the size of Connecticut that would someday be doing construction work.

So enter Elon Musk, who is very passionate about the idea, claims to be convinced it will work, and appears to be putting some money behind it.   With his support, the idea must immediately be treated as more credible, and it does indeed get a lot of press.  But here is the problem for me with Musk:  With him, the idea must also be treated as very probably another attempt by him to drain money out of the taxpayers' pockets into his.  Because that is what he does in so many of his enterprises.

Just the Moon Orbiting the Earth...

... but the images are pretty awesome.  via here.  Taken from the DSCOVR satellite orbiting a million miles away from Earth (my guess is that it sits at the Earth-Sun L1 Lagrange point, where the side of Earth it could see would always be in full sun and the back side of the moon would be fully illuminated as it passes Earth)

nasa-captures-dark-side-of-the-moon-as-it-crosses-earth

 

Excellent Slate Article on GMO Safety

It is a long article, covering a lot of ground, and is full of links to literature on both sides of the debate.  But its conclusions are pretty definite

I’ve spent much of the past year digging into the evidence. Here’s what I’ve learned. First, it’s true that the issue is complicated. But the deeper you dig, the more fraud you find in the case against GMOs. It’s full of errors, fallacies, misconceptions, misrepresentations, and lies. The people who tell you that Monsanto is hiding the truth are themselves hiding evidence that their own allegations about GMOs are false. They’re counting on you to feel overwhelmed by the science and to accept, as a gut presumption, their message of distrust.

Second, the central argument of the anti-GMO movement—that prudence and caution are reasons to avoid genetically engineered, or GE, food—is a sham. Activists who tell you to play it safe around GMOs take no such care in evaluating the alternatives. They denounce proteins in GE crops as toxic, even as they defend drugs, pesticides, and non-GMO crops that are loaded with the same proteins. They portray genetic engineering as chaotic and unpredictable, even when studies indicate that other crop improvement methods, including those favored by the same activists, are more disruptive to plant genomes.

Third, there are valid concerns about some aspects of GE agriculture, such as herbicides, monocultures, and patents. But none of these concerns is fundamentally about genetic engineering. Genetic engineering isn’t a thing. It’s a process that can be used in different ways to create different things. To think clearly about GMOs, you have to distinguish among the applications and focus on the substance of each case. If you’re concerned about pesticides and transparency, you need to know about the toxins to which your food has been exposed. A GMO label won’t tell you that. And it can lull you into buying a non-GMO product even when the GE alternative is safer.

This is just the management summary, the article goes into great depth on all of these.