Japanese researchers find a simple and affordable way to store ammonia

July 13th, 2023

Researchers at the RIKEN Center for Emergent Matter Science (CEMS) in Japan have found a simple and affordable way to store ammonia :

For its current use, ammonia is stored in pressure-resistant containers after liquefying it at temperatures of -27 Fahrenheit (-33 degrees Celsius).

[…]

Kawamoto’s team found that the perovskite ethyl ammonium lead iodide (EAPbI3) reacts with ammonia at room temperature and pressure to make lead iodide hydroxide, or Pb(OH)I. Ethyl ammonium lead iodide has a one-dimensional columnar structure but, after reacting with ammonia, forms a two-dimensional layered structure.

Ammonia is a highly corrosive gas, but the chemical reaction with the perovskite allows for its safe storage that does not need any special equipment to store it either. The retrieval process is also very straightforward. Under vacuum, ethyl ammonium lead iodide can be heated to 122 Fahrenheit (50 degrees Celsius) to release ammonia gas.

[…]

The perovskite-ammonia reaction is fully reversible, and the perovskite can be reused to store ammonia again after retrieval is completed. Interestingly, the perovskite also changes color to white when it stores ammonia and returns to its original yellow after ammonia is retrieved. Scientists can exploit this feature to make color-based sensors to determine the amount of ammonia stored in the perovskite.

He had not absorbed Raeder’s strategic insight

July 12th, 2023

How Hitler Could Have Won World War II by Bevin AlexanderIn 1940, the German high command sent a panzer expert, Major General Wilhelm von Thoma, to North Africa to find out whether German forces should help the Italians, Bevin Alexander explains (in How Hitler Could Have Won World War II) — and also, unofficially, to look over the Italian army in action (or rather inaction):

Thoma reported back that four German armored divisions could be maintained in Africa and these would be all the force necessary to drive the British out of Egypt and the Suez and open the Middle East to conquest. At the time Germany possessed twenty panzer divisions, none being used.

Hitler called Thoma in to discuss the matter. He told Thoma he could spare only one panzer division, whereupon Thoma replied that it would be better to give up the whole idea. Thoma’s comment angered Hitler. He said his concept of sending German forces to Africa was narrowly political, designed to keep Mussolini from changing sides.

Hitler’s comments to Thoma reveal he didn’t see the road to victory through Suez that Raeder had pointed out to him. If he had, he would have insisted on committing German troops.

Hitler’s interest was focused on keeping Mussolini happy and on wild schemes like assaulting Gibraltar. He had not absorbed Raeder’s strategic insight. His mind remained fixed on Russia. He was hoarding his tanks to use there. That’s why he couldn’t spare more than a single panzer division for Africa.

Notorious Russian sub commander assassinated on his morning jog

July 11th, 2023

A Russian submarine commander blamed for atrocities in Ukraine was gunned down on his morning jog in Krasnodar:

Stanislav Rzhitsky, a commander of a submarine in Russia’s Black Sea Fleet and the deputy head of mobilization efforts in Krasnodar, was shot four times in the back and chest in broad daylight on Monday morning, according to local media reports.

[…]

The Ukrainian Defense Ministry’s Main Intelligence Directorate on Tuesday confirmed Rzhitsky’s murder but did not claim responsibility for it, noting only that he had commanded a Russian submarine “involved in missile attacks on Ukraine.” They said he’d been shot seven times with a Makarov pistol.

[…]

The Krasnodar submarine, equipped with Kalibr cruise missiles, was blamed by Ukrainian media for an attack on Vinnytsia last year that killed 27 people. Rzhitsky was also listed in a Ukrainian database that names and shames all those accused of involvement in war crimes.

But Ukrainian authorities say Rzhitsky had also made enemies in the Russian military after refusing to carry out any more missile strikes on Ukraine due to the risks to the civilian population. In a statement, the Department of Strategic Communications of the Armed Forces of Ukraine claimed Rzhitsky was “eliminated by his own for refusing to further carry out the command’s combat orders.”

[…]

But it appears he may have inadvertently made it quite easy for his killer or killers to find him: Rzhitsky regularly posted his running routes on the popular exercise app Strava, and he usually stuck to the same route, according to Baza.

There are clandestine rules of the road

July 10th, 2023

One of the biggest secrets of the Ukraine war, William Arkin says, is how much the CIA doesn’t know:

The Agency is as uncertain about Volodymyr Zelensky’s thinking and intentions as it is about Vladimir Putin’s. And as the Russian leader faces his biggest challenge in the aftermath of a failed mutiny, the Agency is straining to understand what the two sides will do—because President Joe Biden has determined that the United States (and Kyiv) will not undertake any actions that might threaten Russia itself or the survival of the Russian state, lest Putin escalate the conflict and engulf all of Europe in a new World War. In exchange, it expects that the Kremlin won’t escalate the war beyond Ukraine or resort to the use of nuclear weapons.

[…]

“There is a clandestine war, with clandestine rules, underlying all of what is going on in Ukraine,” says a Biden administration senior intelligence official who also spoke with Newsweek. The official, who is directly involved in Ukraine policy planning, requested anonymity to discuss highly classified matters. The official (and numerous other national security officials who spoke to Newsweek) say that Washington and Moscow have decades of experience crafting these clandestine rules, necessitating that the CIA play an outsize role: as primary spy, as negotiator, as supplier of intelligence, as logistician, as wrangler of a network of sensitive NATO relations and perhaps most important of all, as the agency trying to ensure the war does not further spin out of control.

“Don’t underestimate the Biden administration’s priority to keep Americans out of harm’s way and reassure Russia that it doesn’t need to escalate,” the senior intelligence officer says. “Is the CIA on the ground inside Ukraine?” he asks rhetorically. “Yes, but it’s also not nefarious.”

[…]

Neither the CIA nor the White House would give specific responses for confirmation, but they asked that Newsweek not reveal the specific locations of CIA operations inside Ukraine or Poland, that it not name other countries involved in the clandestine CIA efforts and that it not name the air service that is supporting the clandestine U.S. logistics effort.

[…]

Intelligence experts say this war is unique in that the United States is aligned with Ukraine, yet the two countries are not allies. And though the United States is helping Ukraine against Russia, it is not formally at war with that country. Thus, much of what Washington does to aid Ukraine is kept secret – and much of what is normally in the realm of the U.S. military is being carried out by the Agency.

[…]

“The view advanced by many that the CIA is central to the fighting — say, for instance, in killing Russian generals on the battlefield or in important strikes outside Ukraine, such as the sinking of the Moskva flagship – doesn’t play well in Kyiv,” says one retired senior military intelligence official granted anonymity to speak with Newsweek. “If we want Kyiv to listen to us, we need to remind ourselves that the Ukrainians are winning the war, not us.”

[…]

“There are clandestine rules of the road,” says the senior defense intelligence official, “even if they are not codified on paper, particularly when one isn’t engaged in a war of annihilation.” This includes staying within day-to-day boundaries of spying, not crossing certain borders and not attacking each other’s leadership or diplomats. “Generally the Russians have respected these global red lines, even if those lines are invisible,” the official says.

[…]

“The CIA has been operating inside Ukraine, under strict rules, and with a cap on how many personnel can be in country at any one time,” says another senior military intelligence official.

[…]

Newsweek was unable to establish the exact number of CIA personnel in Ukraine, but sources suggest it is less than 100 at any one time.

[…]

Now, more than a year after the invasion, the United States sustains two massive networks, one public and the other clandestine. Ships deliver goods to ports in Belgium, the Netherlands, Germany and Poland, and those supplies are moved by truck, train and air to Ukraine. Clandestinely though, a fleet of commercial aircraft (the “grey fleet”) crisscrosses Central and Eastern Europe, moving arms and supporting CIA operations.

[…]

Russian intelligence is very active in Ukraine, intelligence experts say, and almost anything the U.S. shares with Ukraine is assumed to also make it to Russian intelligence. Other Eastern European countries are equally riddled with Russian spies and sympathizers, particularly the frontline countries.

[…]

As billions of dollars worth of arms started flowing through Eastern Europe, another issue that the CIA is working on is the task of fighting corruption, which turned out to be a major problem. This involves not only accounting for where weapons are going but also quashing the pilfering and kickbacks involved in the movement of so much materiel to Ukraine.

[…]

From Poland, CIA case officers are able to connect with their many agents, including Ukrainian and Russian spies. CIA ground branch personnel of the Special Activities Center handle security and interact with their Ukrainian partners and the special operations forces of 20 nations, almost all of whom also operate from Polish bases. CIA cyber operators work closely with their Polish partners.

The QueSST produces a sonic thump, rather than a boom

July 9th, 2023

Lockheed Martin’s experimental X-59 Quiet Supersonic Technology aircraft, or QueSST, built by the company‘s Skunk Works for NASA, provides no traditional forward visibility to its pilot:

Ultimately, it’s planned that the X-59 will achieve supersonic speeds over land that create no more than a sonic ‘thump’ — rather than the ‘boom’ associated with previous supersonic transports. That could convince U.S. and international regulators to change the laws governing supersonic commercial aviation.

IMG_0027

This is all part of an overall design that’s specifically intended to reduce the kinds of sonic booms that have long been an obstacle in the way of commercial supersonic flight over land. With such a long snout ahead of them, the X-59’s pilot instead relies upon the eXternal Vision System (XVS) and an array of forward-facing high-resolution cameras. An aperture for the 4K camera used in the XVS can be seen in these new photos, located atop the nose, broadly above where the canard foreplanes are located.

Burrola was fired from his job for supposedly violating the store’s policies against chasing after thieves or intervening in a theft

July 8th, 2023

A King Soopers employee in Colorado was fired after he filmed three men stealing $500 worth of laundry detergent:

Santino Burrola, a former military police officer, filmed the three shoplifters stealing the items on Father’s Day June 18 around 6:40 p.m.

The video shows three men in a parking lot hastily transferring laundry detergent into a vehicle. Burrola approaches the vehicle with his phone recording, playfully taunting the thieves.

“Look at them stealing,” he says off-camera. “Really bro? You gotta resort to this? Economy’s not that bad.”

The shoplifters hop in the car and start to drive away. Burrola manages to pull off the aluminum foil covering the license plate. At no point does Burrola physically engage with the shoppers.

The now-viral video has been shared by the Arapahoe County Sheriff’s Office and rapper Snoop Dogg, who has more than 80 million followers on Instagram.

Burrola was fired from his job for supposedly violating the store’s policies against chasing after thieves or intervening in a theft.

Emitting jamming beams discloses a jammer’s location

July 7th, 2023

Britain’s Royal United Services Institute and the US’s Pentagon have acknowledged that Russian electronic warfare is reducing the accuracy of American guided weapons, including JDAMs and HIMARS rockets:

In particular, Withington pointed to the Russian Army’s R-330Zh Zhitel, a mobile truck-mounted jamming system specifically designed to disrupt GPS and satellite communications in the 100 MHz to 2 GHz wavebands. “Signals from the U.S. GPS satellites which JDAM kits use are transmitted on wavebands from 1.164 GHz to 1.575 GHz,” according to Worthington. “These fall squarely within the R-330Zh’s catchment area.”

Worthington claims to have seen official documents that put the R-330Zh range at 18.6 miles, with a 10kW-strong jamming signal. This is “notably stronger than the strength of the GPS signal arriving from space,” he noted. “Moreover, the closer the GPS receiver is to the R-330Zh’s jamming antenna, the stronger the jamming signal becomes.”

In theory, the Selective Availability Anti-Spoofing Module upgrade to JDAM in the early 2000s should ensure that JDAM will only respond to authorized M-Code encrypted military GPS signals. However, Russian jammers may still be able to disrupt the signals through “sheer brute force” jamming beams, Withington said.

Russia could also intercept M-Code signals and retransmit them with slight alterations to a JDAM, causing the bomb to miss. Efforts to bypassing Russian interference by using signals from multiple GPS satellites could in turn be countered by employing multiple jammers.

Russia’s counter-GPS efforts are part of a massive electronic-warfare campaign that has also disrupted Ukrainian radio communications and drone operations.

Russian forces “now employ approximately one major EW system per 10 kilometers [6.2 miles] of frontage, usually situated approximately 7 kilometers [4.3 miles] from the frontline,” according a recent RUSI report on Russian tactics. This jamming has contributed to a Ukrainian drone loss rate that RUSI estimates to be as high as 10,000 UAVs per month.

[…]

Nonetheless, Russian electronic warfare has limitations. Emitting jamming beams discloses a jammer’s location, and Ukraine appears to have located and destroyed Russian systems such as the R-330Zh. Ironically, smothering the airwaves with powerful jamming beams may also be disrupting Russian GPS and radio communications.

The American republic has quietly, steadily acquired a military caste

July 6th, 2023

Since the end of the draft, the American republic has quietly, steadily acquired a military caste:

A declining societal ethos of service, coupled to the tendency of mission-focused military recruiters to “fish where the fish are” by focusing on high-yield geographic areas, has made multigenerational military families the norm. In 2019, nearly 80 percent of Army recruits reported having a family member who had served. For almost 30 percent, that person was a parent.

[…]

A 2021 survey by the Military Family Advisory Network found that just 62.9 percent of military and veteran families would recommend military life, down from 74.5 percent two years before.

[…]

The other structural challenge facing the AVF is that it is still based on the career and family norms of the 1950s. In an era of increased career mobility and dual-income households, the military is still designed for a world of single-income families with the civilian spouse playing the role of supportive camp follower.

[…]

With more women than men completing college and pursuing professional careers, the pool of families willing to take on the burden of military service under this model is steadily dwindling.

The military career model also assumes that senior leaders will be with the same organization for 30 years or more, making the institution an extreme outlier among large employers. This limits the talent pool to those who find such a commitment palatable. In a world where drones and artificial intelligence will likely dominate future conflicts, the isolated and heavily bureaucratic professional-development models of the military will struggle to keep up with the pace of innovation. Congress has authorized lateral entry measures—enlisting those with needed skills at far higher initial rank and pay—to break open this closed labor market, but cultural resistance from the services has prevented these policies from making much impact.

Only Erich Raeder, the German navy commander, saw the danger clearly enough to press repeatedly and with great conviction for another way to gain Germany’s goals

July 5th, 2023

How Hitler Could Have Won World War II by Bevin Alexander When Hitler announced his “resolve to bring about the destruction of the vitality of Russia in the spring of 1941,” Bevin Alexander explains (in How Hitler Could Have Won World War II), his top army generals, along with their staffs, amassed arguments to convince him to neutralize Britain before turning on Russia:

Only Erich Raeder, the German navy commander, saw the danger clearly enough to press repeatedly and with great conviction for another way to gain Germany’s goals.

[…]

Major General Alfred Jodl, chief of operations for the Oberkommando der Wehrmacht (OKW), or armed forces supreme command, felt the same way, though less openly and less forcefully. In a June 30, 1940, memorandum Jodl wrote that if the strike across the Channel did not come off, the Mediterranean offered the best arena to defeat Britain. His recommendation was to seize Egypt and the Suez Canal. Maybe the Italians could do it alone. If not, the Germans could help.

At the time the British had only 36,000 men in Egypt, including a single incomplete armored division under the command of General Sir Archibald Wavell. Moreover, Italy’s entry into the war had closed off Britain’s supply line through the Mediterranean except by means of heavily guarded convoys. The main British route now had to go 12,000 miles around the Cape of Good Hope in South Africa, and up through the Red Sea.

Even if Britain devoted all its strength to building a strong army in Egypt, it would take months, perhaps a year, to do so. And Britain was not going to undertake such a task because it had to concentrate most of its efforts on defense of the homeland.

Italy, aided by Germany, could get superior forces to Italy’s colony of Libya far more quickly. At this stage, it would be relatively easy to use Luftwaffe bombers to neutralize Malta, a British possession only sixty miles south of Sicily, where aircraft, ships, and submarines constituted a major danger to Italian supply ships and reinforcements moving between Italy and Tripoli in Libya.

Hitler in his July 31 meeting did not wholly exclude a “peripheral strategy” in the Mediterranean, and Generals Walther von Brauchitsch, commander in chief of the army, and Franz Halder, chief of staff in the army high command, Oberkommando des Heeres (OKH), proposed sending panzer forces (an “expeditionary corps”) and aircraft to Libya to help the Italians, who were planning an offensive into Egypt.

[…]

But Raeder’s main argument was that the Axis should capture the Suez Canal. After Suez, German panzers could advance quickly through Palestine and Syria as far as Turkey.

“If we reach that point, Turkey will be in our power,” Raeder emphasized. “The Russian problem will then appear in a different light. It is doubtful whether an advance against Russia from the north [that is, Poland and Romania] will be necessary.”

No one realized this truth better than Winston Churchill. In a message to President Roosevelt a few months later, he asserted that if Egypt and the Middle East were lost, continuation of the war “would be a hard, long, and bleak proposition,” even if the United States entered.

[…]

Once Axis forces overran Egypt and the Suez Canal, they would close the eastern Mediterranean to the Royal Navy. The British fleet would immediately retreat into the Red Sea, because it could not be adequately supplied by convoys through the western Mediterranean. Whether or not the Germans seized Gibraltar, Britain would be strategically paralyzed.

[…]

In possession of the Middle East, all of North and West Africa, and Europe west of Russia, its armed forces virtually intact, its economy able to exploit the resources of three continents, Germany would be virtually invincible. Britain’s defiance on the periphery of Europe would become increasingly irrelevant. Germany would not have to inaugurate an all-out U-boat war against its shipping.

Where Barbies rule and Kens are an underclass

July 4th, 2023

Greta Gerwig, the brain behind the new Barbie movie, considers herself a feminist, but…

But this movie is also dealing with [the idea that] any kind of hierarchical power structure that moves in any direction isn’t so great. You go to Mattel and it is really like, “Oh, Barbie has been president since 1991. Barbie had gone to the moon before women could get credit cards.” We kind of extrapolated out from that that Barbieland is this reversed world [where Barbies rule and Kens are an underclass]. The reverse structure of whatever Barbieland is, is almost like Planet of the Apes. You can see how unfair this is for the Kens because it’s totally unsustainable.

Secession Day comes once a year!

July 4th, 2023

Once again, happy Secession Day:

An M-80 contains 80 grains of flash powder

July 3rd, 2023

When I was a kid, every red-blooded American boy wanted to get his hands on some M-80s this time of year:

M-80s were originally made in the mid 20th century for the U.S. military to simulate explosives or artillery fire; later, M-80s were manufactured as fireworks. Traditionally, M-80s were made from a small cardboard tube, often red, approximately 1 1/2 inches (3.8 cm) long and 9/16 inch (1.4 cm) inside diameter, with a fuse coming out of the side; this type of fuse is commonly known as cannon fuse or Visco fuse, after a company responsible for standardizing the product. The tubes usually hold approximately 3 grams of pyrotechnic flash powder. The “M” is designated by a U.S. military convention for “standard” equipment and “80″ is for the 80 grains (5 grams) of flash powder within it.

They’re not quite legal:

Because an M-80 is a pyrotechnic device containing a charge in excess of 50 milligrams of pyrotechnic flash powder, civilian use requires a license issued by federal authorities. This is the result of the Child Protection Act of 1966 and regulation by the Consumer Product Safety Commission, with the purpose of limiting the potential property damage and bodily harm M-80s can cause. This law also covers cherry bombs.

In 1975, federal regulations were passed to limit all consumer-grade fireworks available for general sale to the public in the United States to a maximum of 50 milligrams flash powder, down from a previous maximum of 200 milligrams. However, firecrackers mounted onto a rocket stick, or other aerial firework devices, such as rockets, Roman candles, and the larger version of M-80s (M-1000 etc.), may still have significantly more, up to 130 mg, or more, depending on device and classification, and can be legally purchased by any American civilian citizen, except where prohibited by state law.

A person with a federal explosives license, issued by the ATF, may be allowed to purchase M-80s. Federal and state officials sometimes distribute them to farmers to scare away wildlife damaging their crops.

M-84-Flash-Bang-GrenadeAn M84 flash-bang grenade contains 4.5 grams of magnesium and ammonium nitrate, by comparison:

Upon detonation, it emits an intensely loud “bang” of 170–180 decibels and a blinding flash of more than one million candela within 5 feet (1.5 meters) of initiation, sufficient to cause immediate flash blindness, deafness, tinnitus, and inner ear disturbance.

David Hambling, author of Swarm Troopers, explains drone warfare in Ukraine

July 2nd, 2023

David Hambling, author of Swarm Troopers, explains drone warfare in Ukraine:

There are still only 24 hours in a day

June 30th, 2023

Real GDP per capita has doubled since the early 1980s, Alex Tabarrok noted, but there are still only 24 hours in a day:

How do consumers respond to all that increased wealth and no additional time? By focusing consumption on goods that are cheap to consume in time. We consume “fast food,” we choose to watch television or movies “on demand,” rather than read books or go to plays or live music performances. We consume multiple goods at the same time as when we eat and watch, talk and drive, and exercise and listen. And we manage, schedule and control our time more carefully with time planners, “to do” lists and calendaring. A search at Amazon for “time management,” for example, leads to over 10,000 hits.

Time management is a cognitively strenuous task, leaving us feeling harried. As the opportunity cost of time increases, our concern about “wasting” our precious hours grows more acute. On balance, we are better off, but the blessing of high-value time can overwhelm some individuals, just as can the ready availability of high-calorie food.

[…]

By the way, the same theory also explains why life often appears to unfold at a slower, more serene pace in developing nations. It’s not just an illusion of being on holiday. In places where time is less economically valuable, meals stretch more leisurely, conversations delve deeper, and time itself seems to trudge rather than race. In contrast, with economic development comes an increased pace of life–characterized by a proliferation of fast food, accelerated conversation, and even brisker walking (Levine & Norenzayan, 1999).

They were told to exaggerate as much as possible the main error that the instructor identified

June 29th, 2023

A persistent error is a sign that learning has occurred, but the student has inadvertently learned the “wrong” way really, really well and needs to unlearn it:

Researchers at the University of Verona (Milanese et al., 2008) conducted a study of thirty 13-yr olds learning how to perform the standing long jump in three sessions spread out over a three week period.

[…]

One group received instruction using an experimental teaching method called “Method of Amplification of Error” (MAE group). More details on this in a moment, but the tl;dr version is that this method involves doing things wrong on purpose, not just doing things correctly.

Another group received the traditional instructional method of verbal instruction (direct instruction group).

And the third group received no instructions at all, and just practiced on their own (control group).

[…]

The kids who received no instructions at all performed pretty much the same at both tests. They jumped 158.9cm on the first day of training and 160.6cm on the final day of training. A difference which isn’t statistically significant, and is pretty much what you’d expect.

On the other hand, the students who received instruction and feedback during training did improve over the course of three weeks. They started out at 159.4cm, and improved to 162.3cm by the final test – a gain of 2.9cm. And though an improvement of just over an inch may not sound like much, this would have been the difference between medaling and not medaling in the men’s long jump at the 2020 Tokyo Olympics.

And how did the amplification of error group do?

Well, the kids who were coached using the Method of Amplification of Error improved by an average of 20.4cm, going from 159.5cm on the first day of training to 179.9cm three weeks later. This is almost 7 times the improvement of the regular instruction group, and would have been the difference between Gold and Bronze at the same 2020 Olympics. In the same exact amount of training time!

[…]

On the surface, the Method of Amplification of Error training was not hugely different. The only difference was that instead of being instructed to jump with the correct technique, they were told to exaggerate as much as possible the main error that the instructor identified.

[…]

It seems pretty counterintuitive to practice doing something the exact wrong way, but the researchers explain that this actually deepens our understanding of what not to do and initiates an internal search for a better way to perform the skill.