Western Samoa suffered the highest known mortality of any state during the 1918-1921 pandemic

Monday, January 27th, 2020

The current efforts to curb coronavirus should remind us of the Samoan experience with the 1918 flu — or, rather, with the two very different Samoan experiences:

In 1918 the Samoan archipelago was split between American Samoa (a United States territory) and Western Samoa (previously a German colony but under New Zealand governance from 1914). The 1918 influenza pandemic killed a quarter of Western Samoans, while leaving American Samoa unscathed. Why were their experiences so different?

In late 1918 a second wave within a single pandemic of influenza was spreading throughout Asia and the Pacific. On 30 October 1918 the Union Steamship Company’s Talune left Auckland for its run through Polynesia. The new, more lethal influenza variant had arrived in Auckland with the spring, and several crew members were ill. On 7 November the Talune reached Apia, the main port of New Zealand-occupied Western Samoa.

In 1918 the two Samoas had been divided for nearly twenty years. The United States had sought American Samoa for Pago Pago harbour, a protected anchorage and coaling stop. Western Samoa had become a German colony, and under German rule efforts were made to increase its economic viability and attract European settlers. At the outbreak of the First World War in 1914, Britain had asked New Zealand to occupy Western Samoa to prevent its use by German naval forces.

The two Samoas were in regular contact with each other, and controlled all access to the outside world through two ports: Pago Pago in the east and Apia in the west. The dangers of ship-borne disease were well known, and exclusion of many diseases, especially plague, had been implemented since the imposition of colonial governance nineteen years before.

How then to explain the differing responses to the approach of the pandemic? When the Talune docked in Western Samoa she was not put in quarantine. No word had come from Auckland by wireless, and the ship’s captain did not mention that influenza was in New Zealand. In fact, the captain instructed ill crew and passengers to hide their malady so as to prevent being delayed in Apia.

The Germans had developed their colony of Western Samoa as a commercial enterprise. European-owned plantations occupied one-fifth of the land, supported by a network of European planters and shipping agents. Three times more foreign ships visited Apia than Pago Pago. When the issue of quarantine arose, the New Zealand Governor, Colonel Logan, faced the hostility of this trading community, as well as significant logistical difficulties. Logan needed a larger infrastructure to cope with the number of ships quarantined, and would have had difficulty enforcing any such restrictive edict.

This disinclination to act also had an institutional element. Western Samoa had been taken by New Zealand only four years before, and Logan had received little guidance regarding the territory. In addition, the civilian medical staff in Samoa were both widely scattered and not well respected, and no medical advice regarding quarantine reached Logan.

German administration in Samoa had undermined traditional local authority by taking away the distribution of chiefly titles and reducing the stature of these leaders in local eyes. Thus when New Zealand forces assumed control they found a diminished set of traditional power bases, too weakened to act as effective proxies.

Facing a lack of experience, a dearth of instructions and an unhelpful infrastructure, Logan perceived little support. He chose to wait for directives. The port remained open.

American Samoa presented a different set of circumstances. During nineteen years of benign neglect the administration in Pago Pago had learned to act autonomously. Without oversight from Washington the naval bureaucracy had left most affairs to the traditional Samoan nobility and did not interfere in the granting of titles. The medical staff were naval officers with knowledge of quarantine.

To officials in Washington, American Samoa was a naval station with an incidental indigenous population. There was scant need for traders to maintain a permanent presence in the colony and no effort to attract settlers. This facilitated the American Governor’s use of quarantine: the absence of a trader community allowed General Poyer to impose measures without resistance, and the small number of ships visiting Pago Pago made such an effort manageable. When descriptions of the flu reached Poyer, he acted decisively. Quarantine was established, and implemented under the leadership of traditional chiefs. With modifications, the quarantine in American Samoa continued, with no fatal cases of influenza reported, until late 1921.

In contrast, Western Samoa suffered the highest known mortality of any state during the 1918-1921 pandemic. At least 24 percent of the population died, and most who died were between 18-50 years of age. Half of the most productive age cohort of Western Samoa, and the chiefly and religious elites, died. Western Samoa collapsed.

Smooth-striding beauties sometimes finish at the back of the pack

Wednesday, January 22nd, 2020

Endure by Alex HutchinsonRunning, Alex Hutchinson notes, is surprisingly complicated:

The physiologist and coach Jack Daniels once filmed a bunch of runners in stride, then showed the footage to coaches and biomechanists to see if they could eyeball who was the most efficient. “They couldn’t tell,” Daniels later recalled. “No way at all.” Famously awkward-looking runners like Paula Radcliffe and Alberto Salazar sometimes turn out to be extraordinarily efficient. Smooth-striding beauties sometimes finish at the back of the pack.

[...]

One solution to this problem is to slow it all down. Film a runner and watch the footage in slow motion. Or better yet, attach a bunch of markers to key joints, feed the data into a computer, and create a three-dimensional model of the runner’s stride, so that you can analyze every joint angle and acceleration at your leisure. That’s what biomechanics researchers have been doing for years now, trying to link certain gait characteristics — a knee that rotates inward more than usual, say — with particular injuries like patellofemoral pain or IT band syndrome. They’ve had hints of success, but overall the results have been somewhat muddled and hard to interpret.

[...]

They ran the data from 3D gait analysis of a bunch of runners, some injured and some healthy, through a form of artificial intelligence called unsupervised machine learning, to see if it could group the runners into categories based on their strides, and whether those categories would reflect the types of injuries the runners were subject to. The answers — yes to the first question, no to the second — are both worth thinking about.

Comfortable lives at constant ambient temperature contribute to a lower metabolic rate

Monday, January 20th, 2020

Since the early 19th century, the average human body temperature in the United States has dropped, according to a study by researchers at the Stanford University School of Medicine:

That standard of 98.6 F was established by German physician Carl Reinhold August Wunderlich in 1851. Modern studies, however, have called that number into question, suggesting that it’s too high. A recent study, for example, found the average temperature of 25,000 British patients to be 97.9 F.

[...]

Parsonnet and her colleagues analyzed temperatures from three datasets covering distinct historical periods. The earliest set, compiled from military service records, medical records and pension records from Union Army veterans of the Civil War, captures data between 1862 and 1930 and includes people born in the early 1800s. A set from the U.S. National Health and Nutrition Examination Survey I contains data from 1971 to 1975. Finally, the Stanford Translational Research Integrated Database Environment comprises data from adult patients who visited Stanford Health Care between 2007 and 2017.

The researchers used the 677,423 temperature measurements from these datasets to develop a linear model that interpolated temperature over time. The model confirmed body temperature trends that were known from previous studies, including increased body temperature in younger people, in women, in larger bodies and at later times of the day.

The researchers observed that the body temperature of men born in the 2000s is on average 1.06 F lower than that of men born in the early 1800s. Similarly, they observed that the body temperature of women born in the 2000s is on average 0.58 F lower than that of women born in the 1890s. These calculations correspond to a decrease in body temperature of 0.05 F every decade.

[...]

The decrease in average body temperature in the United States could be explained by a reduction in metabolic rate, or the amount of energy being used. The authors hypothesize that this reduction may be due to a population-wide decline in inflammation: “Inflammation produces all sorts of proteins and cytokines that rev up your metabolism and raise your temperature,” Parsonnet said. Public health has improved dramatically in the past 200 years due to advances in medical treatments, better hygiene, greater availability of food and improved standards of living.

The authors also hypothesize that comfortable lives at constant ambient temperature contribute to a lower metabolic rate. Homes in the 19th century had irregular heating and no cooling; today, central heating and air conditioning are commonplace. A more constant environment removes a need to expend energy to maintain a constant body temperature.

The bird’s fingers are important for steering

Sunday, January 19th, 2020

Birds change the shape of their wings far more than planes do, and David Lentink, a professor of mechanical engineering at Stanford University, and his team explored this while creating their PigeonBot:

The researchers used common pigeon cadavers to try to figure out the mechanics of how birds control the motion of their feathers during flight. Scientists had thought the feathers might be controlled by individual muscles. But they learned that some aspects of bird wing motion are simpler than they expected.

Lentink says that several doctoral students realized that simply by moving the birds’ “wrist” and “finger,” the feathers would fall into place. When the bird’s wrist and finger moves, “all the feathers move, too, and they do this automatically,” he said. “And that’s really cool.”

The findings are some of the first evidence that the bird’s fingers are important for steering. The team replicated the bird’s wing on the PigeonBot using 40 pigeon feathers, springs and rubber bands connected to a wrist and finger structure. When the wrist and finger move, all the feathers move, too.

The researchers used a wind tunnel to see how the feather-and-rubber band design worked under turbulent conditions. “Most aerospace engineers would say this is not going to work well, but it turned out to be incredibly robust,” Lentink says.

They also pinpointed something interesting about how the feathers work together that helps most birds fly in turbulent conditions. At certain moments during flight, such as when a bird is extending its wings, tiny hooks on the feathers lock together like Velcro.

“These tiny, microscopic micro-structures that are between feathers lock them together as soon as they separate too far apart, and a gap is about to form. And it’s really spectacular,” Lentink adds. “It requires an enormous force to separate them.”

These tiny hooks are so small that they’re hard to see even through a microscope. Then, when a bird tucks its wing back in, the feathers unlock automatically, like directional Velcro. Separating the locked feathers makes an audible sound for most birds. The team published this finding in a separate paper in the journal Science.

It’s worth noting that the PigeonBot doesn’t incorporate something you might associate with birds’ wings – flapping. The designers were focused on incorporating the more subtle wrist-and-finger motions of the wings, so the bot appears to be gliding through the air while it’s in flight.

I guess Dune‘s ornithopters might not be so fanciful after all, and we might see a better human-power ornithopter, too.

Instinctive sleeping and resting postures

Sunday, January 19th, 2020

Michael Tetley presents an anthropological and zoological approach to the treatment of low back and joint pain, based on instinctive sleeping and resting postures:

If you are a medical professional and have been trained in a “civilised” country you probably know next to nothing about the primate Homo sapiens and how they survive in the wild. You probably do not know that nature has provided an automatic manipulator to correct most spinal and peripheral joint lesions in primates. In common with millions of other so called civilised people you suffer unnecessarily from musculoskeletal problems and are discouraged about how to treat the exponential rise in low back pain throughout the developed world. Humans are one of 200 species of primates.1 All primates suffer from musculoskeletal problems; nature, recognising this fact, has given primates a way to correct them.

The study of animals in the wild has been a lifelong pursuit. I grew up with tribal people and in 1953-4 commanded a platoon of African soldiers from nine tribes, who taught me to sleep on my side without a pillow so that I could listen out for danger with both ears. I have organised over 14 expeditions all over the world to meet native peoples and study their sleeping and resting postures. They all adopted similar postures and exhibited few musculoskeletal problems. I must emphasise that this is not a comparison of genes or races but of lifestyles. I tried to carry out surveys to collect evidence but they were meaningless, as tribespeople give you the answer they think you want. They often object to having their photographs taken, so I have demonstrated the postures.

Tetley was born in Kenya, where he encountered much worse Mau-Mauing than what Tom Wolfe described:

Mike, who was born and raised in Kenya speaking its native language Swahili, was conscripted to command indigenous troops in the King’s African Rifles as unrest began to spread throughout his homeland.

It was after Mau Mau militants ambushed a police truck that a battle erupted between the rivals.

A clash Mike so vividly recalls as it marked the last time he could appreciate the gift of sight before it was lost.

Remembering the battle, Mike said: “One of the Mau Mau threw a grenade at me and it landed by my foot. I jumped away from it and threw myself on the ground hoping that when it went off I wouldn’t get hit.

“The next thing I remember I was running flat out and I got a bullet in my right ear which came out of my right eye.

“My dad always said I didn’t have anything between my ears and now he’s got definite proof.

“The next thing I remember I fell over and as I picked myself up everything went black. I sat down and I can’t remember much more than that — not in a logical sense anyway.”

Dissatisfied with blasting their victim with a rifle — nearly killing him — the Mau Mau rebels returned armed with machetes to cut up Mike, who lay helpless on the ground nursing his wound. Powerless to defend himself, Mike has always owed his survival to an ally soldier, Reguton — with whom he still has regular contact — who shot dead the seven rebels.

“I was on the ground and they came forward with guns and knives and they tried to cut me up,” he said “Reguton had his gun and shot them and killed them. He killed seven of them from 25 yards — that’s very good shooting, particularly when you’ve only got 28 bullets in a magazine. From 25 yards he would have had three bullets for each person until they were on top of him — I’m very indebted to him.”

For Mike, vivid scenes of massacre and torture remain poignant in his memory. Images of bloodshed to which Mike was repeatedly exposed before he lost his sight have proved impossible to dispel from his mind.

More than 1,800 Kenyan civilians are known to have been murdered by the Mau Mau. Many of the murders of which they were guilty were brutal in the extreme and Mike recalled just one of the savage killings.

“I was walking back to my tent and there was a 12-year-old girl in the middle of the road with her throat cut. There was a note next to her which read ‘We’re not frightened of you, we’ll take you on, the army and the police. It was signed Corporal Kanwemba of the Mau Mau.”

Mike was transferred to a military hospital in England after the attack where he received the devastating news that he would never see again.

He enrolled in a physiotherapy course with the Royal National Institute for the Blind (RNIB) — which brings us back to his paper:

Figure 1 shows a mountain gorilla lying on the ground on his side without a pillow — a position in which I have also seen chimpanzees and gibbons sleeping — and a Kenya African in a similar position on a palm leaf mattress on a concrete floor. Note how he uses his laterally rotated arm as a pillow and can listen out for danger with both ears.

Sleeping Figure 1A Kenyan

Sleeping Figure 1B Gorilla

When lying on one side you do not even need the arm as a pillow: when the lower shoulder is fully hunched, the neck is completely supported. I think the neck should deviate towards the ground as gravity then shuts the mouth, preventing insects from entering, and a little traction is applied to the cervical spine (fig 2, top). When the head is down, the vertebrae are stretched between two anchors and every time the ribs move through breathing the tension is increased, the vertebrae realign themselves, and the movement keeps the joints lubricated. Current thinking is to keep the spine straight by use of a pillow. Has anyone ever seen a gorilla shinning up a tree with a pillow? Note also the plantar flexed foot. A dorsiflexed foot rotates the knee and alters the Q angle (between the resultant pull of the quadriceps muscle and the patella tendon), producing uneven wear and, in time, pain.

Sleeping Figure 2B Side Lying Modified

Sleeping Figure 2A Side Lying

Tribal people do not like lying on the ground in the recovery position while wearing no clothes as the penis dangles in the dust and can get bitten by insects. When the legs are in the reverse recovery position (fig 2, bottom), the penis lies on the lower thigh and is protected. In this position the Achilles tendon of the leading foot can be inserted in the gap between the big toe and the first lesser toe to help correct a bunion.

When sleeping in the open in very cold climates and when the ground is wet, humans often resort to sleeping on their shins, like the Tibetan caravaneers photographed by Peter, Prince of Greece and Denmark, in 1938 (fig 3). Nature has not covered the anterior border of the tibia and the medial border of the ulna with muscle, so in this position there is only skin and bone in contact with the cold ground and heat loss is reduced. The body is also folded to conserve heat; both ears can listen for danger, be it lion or terrorist; and when the head is down gravity shuts the mouth and it is impossible to snore.

Sleeping Figure 3 Tibetans

Figure 4 shows the “lookout posture,” another position using the arm as a pillow to reset shoulder, elbow, and wrist: accessory joint movement is regained because the weight of the head resting on the arm is at right angles to the line of movement, producing a lateral glide. I have seen Howler monkeys using this position in Costa Rica

Sleeping Figure 4 Lookout Posture

Quadrupedal lying (fig 5) is ideal for stretching collagen fibre throughout the body. In the penis protect position, with the pelvis locked, the spine is rotated and flexed. With the elbows out sideways and the chest on the ground, many spinal lesions can be corrected gently using nature’s automatic manipulator. Animals are clever because they use the radiant heat from the sun to encourage relaxation of their muscles when they adopt this posture. In this photograph note that the dog’s sternum is in full contact with the ground but that of the human is not: this can be easily corrected by rotating the right arm medially to lower the sternum. It has been noted that guide dogs working in towns breathe the same pollutants as humans yet do not have asthma. Could this be because when they lie on their chests the kickback from the upper ribs keeps the corresponding vertebrae mobile, allowing the sympathetic system to work efficiently?

Sleeping Figure 5 Quadrupedal Lying

Arabs in the Sahara will sit in the position shown in figure 6 for hours and it keeps the forefoot aligned on the hindfoot, as the ischia rest directly on the calcanea and the feet point straight backwards. People who sit like this do not seem to get much osteoarthritis in their knees in old age. Cross legged sitting prevents arthritic hips. A flying doctor from Kenya remarked to me that over the years as local tribesmen became more civilised he more often saw arthritis of hips and knees.

Sleeping Figure 6 Sitting on the heels

The full squat, with the heels on the ground (fig 7) resets the sacroiliac joints; takes hips, knees and ankles through the full range; and can be very useful in treating backs. To start with, some Westerners have to hold on to a door frame.

Sleeping Figure 7 Full Squat

Largely anecdotal evidence has been collected by “old timers” for over 50 years from non-Western societies that low back pain and joint stiffness is markedly reduced by adopting natural sleeping and resting postures. This observation must be recorded to allow further research in this direction as these primitive societies no longer exist and the great apes living in the wild are heading for extinction. All we have to do is to be good primates and use these preventive techniques.

(Hat tip to Gwern.)

Dogs follow a strict code of conduct

Tuesday, January 14th, 2020

Canids (members of the dog family) follow a strict code of conduct when they play:

1. Ask first and communicate clearly. Many nonhumans announce that they want to play and not fight or mate. Canids punctuate play sequences using a bow to solicit play, crouching on their forelimbs while standing on their hind legs. Bows are used almost exclusively during play and are highly stereotyped — that is, they always look the same — so the message “Come play with me” or “I still want to play” is clear. Play bows are honest signals, a sign of trust.

Even when an individual follows a play bow with seemingly aggressive actions such as baring teeth, growling or biting, their companions demonstrate submission or avoidance only around 15% of the time, which suggests they trust the bow’s message that whatever follows is meant in fun. Trust in one another’s honest communication is vital for fair play and a smoothly functioning social group.

2. Mind your manners. Animals consider their play partners’ abilities and engage in self-handicapping and role reversing to create and maintain equal footing. For instance, a coyote might not bite their play partner as hard as they can, handicapping themselves to keep things fair. And a dominant pack member might perform a role reversal, rolling over on their back (a sign of submission that they would never offer during real aggression) to let their lower-status play partner take a turn at “winning.”

Human children also behave this way when they play, for instance, taking turns overpowering each other in a mock wrestling match. By keeping things fair in this manner, every member of the group can play with every other member, building bonds that keep the group cohesive and strong.

3. Admit when you are wrong. Even when everyone wants to keep things fair, play can sometimes get out of hand. When an animal misbehaves or accidentally hurts his play partner, they typically apologize, just like a human would. After an intense bite, a bow sends the message, “Sorry I bit you so hard — this is still play regardless of what I just did. Don’t leave; I’ll play fair.” For play to continue, the other individual must forgive the wrongdoing. And forgiveness is almost always offered; understanding and tolerance are abundant during play as well as in daily pack life.

4. Be honest. An apology, like an invitation to play, must be sincere. Individuals who continue to play unfairly or send dishonest signals often quickly find themselves ostracized. This has far greater consequences than simply reduced playtime. For example, my long-term field research shows that juvenile coyotes who do not play fair often end up leaving their pack and are up to four times more likely to die than those individuals who remain with others. There are substantial risks associated with dispersal by young coyotes, and violating social norms, established during play, is not good for perpetuating one’s genes.

[...]

A few people have asked me if dogs always play fair, mentioning a few examples in which play escalated into an encounter that seemed to be aggressive or it seemed like this was going to happen. I explain that this is extremely rare, and tell them about a study by Melissa Shyan and her colleagues in which it was reported that fewer than 0.5 percent of play fights in dogs developed into conflict, and only half of these were clearly aggressive encounters.

Almost any change led to increased productivity

Friday, January 10th, 2020

The term Hawthorne effect was coined in 1958 by Henry A. Landsberger when he was analyzing earlier experiments from 1924–32 at the Hawthorne Works (a Western Electric factory outside Chicago) to describe the surprising finding of the numerous productivity studies:

The original purpose of the Hawthorne studies was to examine how different aspects of the work environment, such as lighting, the timing of breaks, and the length of the workday, had on worker productivity.

In the most famous of the experiments, the focus of the study was to determine if increasing or decreasing the amount of light that workers received would have an effect on how productive workers were during their shifts. Employee productivity seemed to increase due to the changes but then decreased once the experiment was over.

What the researchers in the original studies found was that almost any change to the experimental conditions led to increases in productivity. When illumination was decreased to the levels of candlelight, production increased. In other variations of the experiments, the production also improved when breaks were eliminated entirely and when the workday was lengthened.

The results were surprising and the researchers concluded at the time that workers were actually responding to the increased attention from their supervisors. Researchers suggested that productivity increased due to attention and not because of changes in the experimental variables. Landsberger defined the Hawthorne effect as a short-term improvement in performance caused by observing workers.

Roman numerals were used in academia

Friday, January 10th, 2020

The Hindu-Arabic number system was invented in India around the year 500 AD, and during the Early Middle Ages spread throughout Arabic-speaking world, but it did not spread quickly throughout Europe:

Crossley examined 1398 manuscripts created between the years 1200 and 1500 to see how much use of the Hindu-Arabic numerals, and found that throughout this period Roman numerals were still largely preferred. For the 13th century, only 7% of manuscripts had the new numbers, rising to 17% for the 14th century and 47% for the 15th century. He also found that in many instances where writers were mixing the two systems, sometimes within the same number – for example, one sometimes found M (for 1000) followed by Arabic numerals.

That crazy, mixed-up example sounds like a superior system, like a more readable scientific notation, where you succinctly clarify the order of magnitude (M = 103) and then rattle off the significant digits.

The new and old systems continued side by side, but in different domains:

Roman numerals were used in academia where universities taught about abstract properties: square numbers, triangular numbers, etc. Hindu-Arabic numerals were used for the practical world of commerce. This occurred in special, so-called abacus schools where merchants and their employees were taught the new Hindu-Arabic numerals. Such schools were prevalent in Italy. Since they were intimately involved with sometimes quite complicated calculations, the commercial use ultimately led to the development of algebra. It was not until the sixteenth century that the two domains came together. At that time academia at last embraced the study of methods of calculation, in particular algebra, while retaining its theoretical concern with abstract properties of numbers.

The hot spots on the suicide map and the hot spots on the homicide map would coincide

Tuesday, December 31st, 2019

BJ Campbell points to geographic evidence that gun deaths are cultural:

I was recently pointed to a pretty amazing Geographic Information Systems (GIS) project hosted by The Oregonian, which uses CDC data and population rate data to determine the gun death rate, gun homicide rate, and gun suicide rate within the country on a county by county basis. [...] Deaths are expressed as rates per 100,000 population, and above average rates are red, while below average rates are blue.

Gun deaths per 100k people

We hear a lot of banter from the “anti-gun” media that these problems are gun problems, and they’ve concocted this “gun deaths” number in order to lump these into the same problem and gloss over the differences. But if the problem were “guns,” then the hot spots on the suicide map and the hot spots on the homicide map would coincide, and would be related to gun ownership rates. There are only a few places where they overlap. Most of the hot zones for suicide have low homicide rates, and most of the hot zones for homicide have low suicide rates.

Gun homicides per 100k people

Gun suicides per 100k people

Poor black folks have a gun homicide problem, while poor white folks have a gun suicide problem.

American Nations Today

The break between systemic firearm suicide and sporadic firearm suicide within the south is almost directly foretold by the boundaries between Greater Appalachia and the Deep South.

By virtue of their superior ambition and energy but also by default

Sunday, December 29th, 2019

Richard Rhodes’ The Making of the Atomic Bomb is also a history of European Jews:

The operators of those mechanisms [of capitalism and industrialization], by virtue of their superior ambition and energy but also by default, were Jews, who represented about 5 percent of the Hungarian population in 1910. The stubbornly rural and militaristic Magyar nobility had managed to keep 33 percent of the Hungarian people illiterate as late as 1918 and wanted nothing of vulgar commerce except its fruits. As a result, by 1904 Jewish families owned 37.5 percent of Hungary’s arable land; by 1910, although Jews comprised only 0.1 percent of agricultural laborers and 7.3 percent of industrial workers, they counted 50.6 percent of Hungary’s lawyers, 53 percent of its commercial businessmen, 59.9 percent of its doctors and 80 percent of it financiers.

America’s culture of achievement is inducing Murray to continue to produce major works

Saturday, December 28th, 2019

Human Diversity by Charles MurrayCharles Murray’s Human Diversity is not as controversial as you might think, Tyler Cowen says:

Overall this is a serious and well-written book that presents a great deal of scientific evidence very effectively. Anyone reading it will learn a lot. But it didn’t change my mind on much, least of all the most controversial questions in this area. If anything, in the Bayesian sense it probably nudged me away from geneticist-based arguments, simply because it did not push me any further towards them.

Murray of course will write the book he wants to, but my personal wish list was two-fold: a) a book leaving most of the normal science behind, and focusing only on the uncertain and controversial frontier issues, in great detail, and b) much more discussion of the import of culture.

Most of all, I am happy that America’s culture of achievement is inducing Murray to continue to produce major works at the age of 76, soon to be 77.

Vanadium dioxide conducts electricity without conducting heat

Tuesday, December 24th, 2019

Researchers have identified a metal that conducts electricity without conducting heat:

The metal, found in 2017, contradicts something called the Wiedemann-Franz Law, which basically states that good conductors of electricity will also be proportionally good conductors of heat, which is why things like motors and appliances get so hot when you use them regularly.

But a team in the US showed this isn’t the case for metallic vanadium dioxide (VO2) — a material that’s already well known for its strange ability to switch from a see-through insulator to a conductive metal at the temperature of 67 degrees Celsius (152 degrees Fahrenheit).

[...]

“For electrons, heat is a random motion. Normal metals transport heat efficiently because there are so many different possible microscopic configurations that the individual electrons can jump between.”

“In contrast, the coordinated, marching-band-like motion of electrons in vanadium dioxide is detrimental to heat transfer as there are fewer configurations available for the electrons to hop randomly between,” he added.

There is time to reflect on the story and to see its reverberations

Thursday, December 19th, 2019

Clinicians at the Cincinnati Children’s Reading and Literacy Discovery Center have used MRI scanners to find a Goldilocks effect in how children react to being read to:

For a small 2018 study involving 27 children around the age of 4, the researchers watched how the young brains responded to different stimuli. As with the first bowl of porridge that Goldilocks finds in the house of the Three Bears, the sound of the storytelling voice on its own seemed to be “too cold” to get the children’s brain networks to fully engage. Like the second bowl that Goldilocks samples, animation of the sort that children might see on a TV screen or tablet was “too hot.” There is just too much going on, too quickly, for the children to be able to participate in what they were seeing. Small children’s brains have no difficulty registering bright, fast-moving images, as experience teaches and MRI scanning confirms, but the giddy shock and awe of animation doesn’t give them time to exercise their deeper cognitive faculties.

Just as Goldilocks sighs with relief when she takes a spoonful from the third bowl of porridge and finds that it is “just right,” so a small child can relax into the experience of being read a picture book. There is a bit of pleasurable challenge in making sense of what he’s seeing and hearing. There is time to reflect on the story and to see its reverberations in his own life — a transaction that may be as simple as the flash of making a connection between a real donkey he once saw with the “honky tonky, winky wonky donkey” of Craig Smith’s picture book. The collaborative engagement that a child brings to the experience is so vital and productive that reading aloud “stimulates optimal patterns of brain development,” as a 2014 paper from the American Academy of Pediatrics put it, strengthening the neural connections that will enable him to process more difficult and complex stories as he gets older.

Much of the hidden magic of reading aloud has to do with those curious eyes and that devouring gaze. Looking at a book with an adult, a child increases his capacity for “joint attention,” noticing what others see and following their gaze. This phenomenon has a remarkable tempering power in children. It encourages the development of executive function, an array of skills that includes the ability to remember details and to pay attention. Children “learn to naturally regulate their attention when they are focusing on a task they find interesting in a context that is nurturing, warm and responsive,” as Vanderbilt University’s David Dickenson and colleagues put it in a paper summarizing the rich developmental value of reading aloud.

By contrast, fast-paced TV shows have been shown to impair executive function in young children after as little as nine minutes of viewing. Nor is that the only tech-related downside. Babies look at adults to see where we’re looking, so if we’re glued to our electronic devices, that’s what will draw their gaze too. What they see may not be what we want them to see. As the psychologist Catherine Steiner-Adair has written: “Babies are often distressed when they look to their parent for a reassuring connection and discover the parent is distracted or uninterested. Studies show that they are especially perturbed by a mother’s ‘flat’ or emotionless expression, something we might once have associated with a depressive caregiver but which now is eerily similar to the expressionless face we adopt when we stare down to text, stare away as we talk on our phones or stare into a screen as we go online.”

A Tesla valve allows a fluid to flow preferentially in one direction, without moving parts

Wednesday, December 18th, 2019

In 1920, Nikola Tesla was awarded U.S. Patent 1,329,559 for his valvular conduit, or Tesla valve, which allows a fluid to flow preferentially in one direction, without moving parts:

Their skill was in avoiding the same old patterns

Sunday, December 15th, 2019

One tool for avoiding cognitive entrenchment, David Epstein reports (in Range), is to keep one foot outside your world:

Scientists and members of the general public are about equally likely to have artistic hobbies, but scientists inducted into the highest national academies are much more likely to have avocations outside of their vocation. And those who have won the Nobel Prize are more likely still. Compared to other scientists, Nobel laureates are at least twenty-two times more likely to partake as an amateur actor, dancer, magician, or other type of performer. Nationally recognized scientists are much more likely than other scientists to be musicians, sculptors, painters, printmakers, woodworkers, mechanics, electronics tinkerers, glassblowers, poets, or writers, of both fiction and nonfiction. And, again, Nobel laureates are far more likely still. The most successful experts also belong to the wider world. “To him who observes them from afar,” said Spanish Nobel laureate Santiago Ramón y Cajal, the father of modern neuroscience, “it appears as though they are scattering and dissipating their energies, while in reality they are channeling and strengthening them.”

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“When we were designing the first Macintosh computer, it all came back to me,” [Steve Jobs] said. “If I had never dropped in on that single course in college, the Mac would have never had multiple typefaces or proportionally spaced fonts.”

Or electrical engineer Claude Shannon, who launched the Information Age thanks to a philosophy course he took to fulfill a requirement at the University of Michigan. In it, he was exposed to the work of self-taught nineteenth-century English logician George Boole, who assigned a value of 1 to true statements and 0 to false statements and showed that logic problems could be solved like math equations. It resulted in absolutely nothing of practical importance until seventy years after Boole passed away, when Shannon did a summer internship at AT&T’s Bell Labs research facility. There he recognized that he could combine telephone call-routing technology with Boole’s logic system to encode and transmit any type of information electronically. It was the fundamental insight on which computers rely. “It just happened that no one else was familiar with both those fields at the same time,” Shannon said.

[...]

Connolly’s primary finding was that early in their careers, those who later made successful transitions had broader training and kept multiple “career streams” open even as they pursued a primary specialty.

[...]

They employed what Hogarth called a “circuit breaker.” They drew on outside experiences and analogies to interrupt their inclination toward a previous solution that may no longer work. Their skill was in avoiding the same old patterns.