Tom Scott
Published on 13 Mar 2017Today’s guest video is from Grady at Practical Engineering! Go subscribe: https://www.youtube.com/user/gradyhillhouse
The Hyatt Regency Hotel collapse was a disaster that changed engineering: it’s taught in colleges and universities as a way to make it clear: you check and double-check everything. Something that seems like a subtle change can cause a catastrophic failure if it’s not thoroughly checked first!
May 12, 2018
The Disaster That Changed Engineering: The Hyatt Regency Collapse
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May 10, 2018
Manufacturing plywood boards: then and now
Victoria and Albert Museum
Published on 24 Jul 2017Plywood is a simple material made by glueing together thin sheets of wood, known as veneers or plies. These basic elements have remained broadly the same throughout its history. The most significant breakthrough in its production came in the early 1800s with the development of steam-powered machines that could cut veneers cheaply. The most influential of these was the rotary veneer cutter.
The cutter rotates a log against a wide, horizontal blade, causing it to ‘peel’ into a continuous sheet of wood. This enables the creation of longer, wider sheets of veneer than previously possible and with little waste. Using these machines meant that plywood could be manufactured quickly and inexpensively on a large scale.
This film shows the stages in manufacturing plywood boards in the mid-20th century and today. The process remains essentially unchanged, although today many of the machines are much faster and computer controlled.
Produced as part of the V&A exhibition Plywood: Material of the Modern World (15 July – 12 November 2017) https://www.vam.ac.uk/plywood
Sponsored by MADE.COM. Supported by the American Friends of the V&A
Find out more about plywood with our fascinating exhibition book, Plywood: A Material Story
https://www.vam.ac.uk/shop/plywood-a-material-story-148486.html
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May 9, 2018
Royal Navy buys the Terminator … of mines
At The Register Gareth Corfield updates us on the latest step towards Skynet, uh, Seanet:
The Navy’s latest robot minesweeper. It’ll blow things up but leave your pint alone, thankfully
The Royal Navy has acquired a search-and-destroy robot boat intended for destroying mines.
A first for Britain’s naval service, the roboat, built by German firm Atlas Elektronik’s UK subsidiary, drives itself around the high seas towing three auxiliary boats fitted with electro-acoustic transmitters. The transmitters generate pings that trigger modern digital mines at a safe distance from either the roboat flotilla or actual human-carrying shipping.
So far the MoD’s £13m contract with Atlas has netted it one complete boat-with-gear system on an R&D basis, with options available to buy more. The trials boat has just been handed over to the RN following proving of the design’s detect-and-avoid algorithms in what appears to be a live training data-versus-AI comparison exercise.
In maritime terms, the roboats comply with the International Regulations for the Prevention of Collisions at Sea (known as the Colregs – they’re the seagoing version of the Highway Code), though The Register would be most intrigued to see how they cope with scenarios that end up invoking rule 2(b).*
“This autonomous minesweeper takes us a step closer to taking our crews out of danger and allowing us to safely clear sea lanes of explosives, whether that’s supporting trade in global waters and around the British coastline, or protecting our ships and shores,” said defence procurement minister Guto Bebb in the usual canned quote.
* Rule 2, as published (PDF) by the Department for Transport, states: “Construing and complying with these Rules due regard shall be had to all dangers of navigation and collision and to any special circumstances, including the limitations of the vessels involved, which may make a departure from these Rules necessary to avoid immediate danger.”
Update, 14 May: UK Armed Forced Commentary has more information on the unmannned minesweeper system.
12 October 2005 was an historic day for the Royal Navy, because the Hunt class minesweepers HMS Middleton and HMS Ledbury conducted the last evolution at sea involving sweep gear, both the Oropesa mechanical wire system and the combined influence sweep equipment. The Royal Navy at that point had already operated unmanned, remotely controlled sweep systems in 2003 during waterway clearance work in Iraq, notably the opening of Umm Qasr. Under a UOR, a number of Combat Support Boats with remote controls were used to tow the Mini Dyad System (MDS) produced by Australian Defence Industries (ADI) and Pipe Noise Makers. Called Shallow Water Influence Minesweeping System (SWIMS), they were sent ahead of the RN minehunters as precursor sweeps against ground influence mines. The future of MCM was taking the path of stand-off action through unmanned systems and it was felt that the more than 100 years of manned ships sweeping were at an end.
The replacement for the sweep equipment was to come through the Flexible Agile Sweeping Technology, or FAST. The idea was to put two unmanned surface vehicles on the Hunt class vessels by modifying their open, capacious stern area. FAST, however, proved anything but fast, and even though a contract was signed in 2007 by the MOD with the Atlas-QED consortium, comprising Atlas Elektronik UK, QinetiQ and EDO Corporation, the resulting Technology Readiness Demonstrator never made it on the Hunt class. FAST became a test platform that spent the following years doing all sort of trials and demonstrations. Initially intended only for towing sweep kit, it ended up testing remote deployment and recovery of Sea Fox unmanned underwater vehicles, demonstrating that stand off clearance of minefields was possible.
Atlas Elektronik UK continued to work with the MOD and on its own, and eventually developed in-house the ARCIMS (ATLAS Remote Combined Influence Minesweeping System) system, which has enjoyed a first export success in an unnamed Middle East navy and has gone on to become the much delayed replacement for the Hunt’s sweeping capability within the Royal Navy.
An ARCIMS seaframe, but manned, was delivered to the Royal Navy in 2014 for trials and development purposes, and remains in service with the Maritime Autonomous System Trials Team (MASTT) of the Royal Navy as RNMB Hazard.
On 6 march 2015, Atlas received a 12.6 million pounds order from the MOD for a first ARCIMS-derived system, in the unmanned configuration, configured to tow sweeping equipment. The system has now been accepted, and according to MASTT, which has already trialed it extensively, the new boat is called RNMB Hussar.
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May 6, 2018
Tank Chats #29 Daimler Dingo Scout Car | The Tank Museum
The Tank Museum
Published on 21 Dec 2016The wheeled armoured scout car was the British Army’s principal reconnaissance vehicle from the beginning of World War II until the 1980s.
Scout cars were small and much quieter than a tracked vehicle; units equipped with scout cars relied on stealth to obtain information, rather than fighting for it. The Daimler Dingo entered service with the British Army in 1939 and served until the middle 1960s as a reconnaissance and liaison vehicle used by armoured and infantry divisions.
It was so versatile that a multitude of uses were found for it: medical officers used them to search for casualties in the battle field while one unit even issued a Dingo to its chaplain!
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May 5, 2018
Canada is #1 in the world! In the ripping-off-the-wireless-user sweepstakes!
This is the sort of thing that isn’t really surprising — if you’re a Canadian wireless data user — but puts it into a sad, sad perspective:
The sad state of Canadian wireless pricing is old news for consumers and the government, but a new report graphically demonstrates how Canadians face some of the least competitive pricing in the developed world. The Rewheel study measured pricing in EU and OECD markets by examining how many gigabytes of 4G wireless data consumers get for the equivalent of 30 euros. This chart from Rewheel says it all:
Canada is at the far left of the chart with consumers getting less for their money than anyone else. While many countries offer unlimited mobile data at that price, the report says Canadian carriers offer a measly 2 GB. The smartphone data plans aren’t much better, with nearly all countries offering better deals and many shifting to unlimited data at that price.
[…]
In addition to outrageously expensive wireless data plans, Canadians also face huge overage charges (more than a billion dollars per year generated in the wireless overage cash grab) and steadily increasing roaming charges. Yet when it came to introducing greater resale competition, the CRTC rejected new measures that it admitted could result in some improvement to affordability.
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Passwords, again
At The Register, a meditation on passwords by Kieren McCarthy:
“It’s World #PasswordDay! A reminder to change your pins/passwords frequently,” it advised anyone following the hashtag “PasswordDay”. But this, as lots of people quickly pointed out, is terrible advice.
But hang on a second: isn’t that the correct advice? Weren’t all sysadmins basically forced to change their systems to make people reset passwords every few months because it was better for security?
Yes, but that was way back in 2014. Starting late 2015, there was a big push from government departments across the world – ranging from UK spy agency GCHQ to US standard-setting National Institute of Standards and Technology (NIST) and consumer agency the Federal Trade Commission (FTC) – to not do that.
That said, the past few years has been virtually defined by the loss of billions of usernames and passwords from corporations, ranging from your email provider, to your credit agency, home improvement store, retail store and, yes, even government departments.
In that case, does it not in fact make sense to get people to periodically change their passwords? Well, yes. And no.
Yes, because the information would age and so become irrelevant faster. No, because constant resets eat up resources, tend to nudge people toward using simpler passwords, and don’t really make it harder for some miscreant using a brute force attack to guess the password.
[…]
Random or pronounceable?
Everyone agrees that using the word “password” for a password is pretty much the dumbest thing you can do. But so many people still do it that designers have been forced to hardcode a ban on the word into most password systems.
But from there – where do you go? How much better is “password1”? Is it sufficiently better? What about switching letters to other things, like “p@ssw0rd”? Yes, objectively, that is better. But the point is that there are much better ways. And that comes down to basically two choices: random or pronounceable.
The best random password is one that really is random i.e. not a weird spelling that you quickly forget but a combination of letters, numbers and symbols like “4&bqJv8dZrXgp” that you would simply never be able to remember.
But here’s the thing – the reason that particular password is better is largely because in order to use and generate such passwords, you would likely use a password manager. And password managers are great things that we’ll deal with later.
But here’s the thing: if someone is trying to crack your password randomly they are likely to be using automated software that simply fires thousands of possible passwords at a system until it hits the right one.
In that scenario, it is not the gibberish that is important but the length of the password that matters. Computers don’t care if a password is made up of English words – or words of any language. But the longer it is, the more guesses will be needed to get it right.
As our dear truthsayer XKCD points out: “Through 20 years of effort we’ve successfully trained everyone to use passwords that are hard for humans to remember, but easy for computers to guess.”
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May 4, 2018
Tesla’s tipping point?
Robert Tracinski on the amazingly long run Elon Musk and crew have had in the electric car business without (yet) turning a profit:
Elon Musk may finally be running out of other people’s money. That’s the upshot of a report on how Tesla is burning so much cash it may run out by the end of the year. This is a company that has raised more than $5 billion from its investors so far, and it is still going to need many billions more — if it can get them. What is more interesting is how Tesla got to the point where it is still bleeding cash, just when it was finally supposed to be making good on its extravagant promises.
The company has always been a triumph of PR hype and political messaging over reality. Why invest in Tesla? Why buy a Tesla? Because you’re not just buying a car — you’re participating in a social and technological revolution. You are the leading edge of the new era of electric cars and the obsolescence of the gasoline engine — which will literally save the planet, or so the story goes.
But it’s not just about global warming. You’re also helping Elon Musk revolutionize the entire manufacturing process by building super-automated, hyper-roboticized factories. He’s on the leading edge of the self-driving car revolution, already introducing a feature he calls “Autopilot.” If we don’t manage to save this planet, don’t worry. By boosting Musk, you’re helping him find us another planet to colonize.
In actuality, what has Tesla produced? A very nice car — for $100,000. There are a lot of very nice cars you can buy for $100,000, if you’re the sort of person who thinks this is a reasonable amount of money to spend on a car, as opposed to a house. More to the point, there are a lot of very nice cars you can buy for $50,000. But Tesla has been able to charge an irrationally high premium for sleek design, technological glamour, and what a Tesla-owning friend of mine describes as “happy tree-hugger feelings.”
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May 1, 2018
Shooting a Suppressed Sten Gun
Forgotten Weapons
Published on 19 Mar 2018Sold for $7,475 (transferrable).
During World War Two, the British spent several years developing a silenced version of the Sten gun for special operations commandos and for dropping to mainland European resistance units. This is a recreation of one of the experimental types, based on a MkII Sten with the receiver lengthened into an integral suppressor. So – how does it shoot?
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April 30, 2018
The Ferdinand: What Not To Do When Building a Tank
Potential History
Published on 11 Mar 2018A brief history of the VK 45.01 (P), or the Porsche Tiger, and the disaster it later became.
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April 29, 2018
Tank Crew Training – More German Tank Prototypes I OUT OF THE TRENCHES
The Great War
Published on 28 Apr 2018Chair of Wisdom Time!
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Pipe Dreams: What Happened To Hovertrains?
Mustard
Published on 8 Apr 2018In 1974, a French train sets a speed record, exceeding 250 miles per hour. But this train is unlike any other before it. Instead of rolling on wheels, it hovers on a cushion of air. In the 1970’s hovertrains were seriously being considered the solution to slow, antiquated railways, which increasingly had to compete with new superhighways and even intercity air travel.
Without the rolling resistance of train wheels, hovertrains promised greater efficiency and much higher speeds. By feeding high pressure air through lifting pads, hovertrains float on a cushion of air much like a hovercraft.
One of the most widely known hovertrain prototypes was called the Aerotrain. Lead engineer Jean Bertin and his team in France, designed several versions, including one that could carry 80 passengers. The i80HV was powered by a turbofan sourced from an airliner, producing over twelve thousand pounds of thrust. At the front, a 400 horse power gas-turbine supplied high-pressure air to hover the twenty loaded train a quarter of an inch off its guideway. The British and Americans also experimented with hovertrain technology, incorporating the linear induction motor for improved efficiency. British research led to the development of the RTV-31 Tracked Hovercraft, and the American’s developed several prototypes, culminating in the development of the Urban Tracked Air Cushion Vehicle (UTACV).
But like their counterpart the Maglev, Hovertrains failed to revolutionize rail. Hovertrains, Maglevs, or any other innovative alternative to rail has to compete with nearly a million miles of rail line already in existence. With stations and infrastructure built-out in nearly every city in the world. The limitations of conventional railways were overcome not a single innovative leap forward, but by incremental improvements. Existing rail networks were modernized with sections of track that could handle higher speeds. New signaling technologies were developed along with more advanced wheelsets.
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April 28, 2018
Lab-Grown Meat Is Coming to Your Supermarket. Ranchers Are Fighting Back.
ReasonTV
Published on 26 Apr 2018The U.S. Cattlemen’s Association petitioned the USDA to declare that “meat” and “beef” exclude products not “slaughtered in the traditional manner.”
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How A Man Shall Be Armed: 14th Century
Royal Armouries
Published on 20 Feb 2017Discover how the introduction of plate armour changed the way knights of the 14th Century armed themselves for battle.
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April 27, 2018
The rise of the “sexbot”
In Jacobite, Diana Fleischman discusses the appeal of sexbots to young (and not-so-young) men:
Sexbots are usually woman-shaped gynoid machines. At the present time, sex robots are simple: they’re silicone sex dolls that have some capacity for movement and response. Manufacturers are rolling out new models and new promises: sex robots that respond to touch and penetration, sex robots with interchangeable faces and bodies and sex robots with different personalities. Future robots will have all the allure of the cues of fertility in a flesh-and-blood woman combined with the artificial intelligence that creates compulsive reward directed behavior.
Sex robots are overwhelmingly gynoid because heterosexual men drive the market for sexual products like prostitution and pornography. Across cultures, men desire more sexual partners, need to know someone for less time before they want to have sex with them, and have lower standards for a sexual liaison than women. Looking at gay men is instructive here. Their sexual interactions are not limited by women’s sexual choosiness and they, on average, have many more sexual partners than straight men or lesbians.
It isn’t hard to see the reason for this. Men don’t get pregnant and don’t lactate, and they have smaller, easier-to-produce sex cells than women. For a man, the cost of producing offspring is cheap. Getting one’s genes into the next generation is the engine of evolution. The low opportunity costs make men motivated to take every opportunity, even if it comes in the form of a robot. Ever think a dog is dumb for growling at his reflection in the mirror? Human men can become aroused looking at flat images of nude women in black and white, our evolved psychology can respond in maladaptive ways towards novel stimuli.
[…]
My view is that the uncanny valley is something analogous to Capgras delusion, a psychological disorder that causes sufferers to believe that someone they know has been taken over by an imposter, often inhuman. According to VS Ramachandran, there are two aspects to recognizing faces: the identification of the external familiar representation and the “internal” validation – the warm emotion that goes along with it. In the uncanny valley, you recognize a robot as humanlike, but it’s missing the facial movement or some other characteristic that gives you a warm feeling of recognition. Many men won’t experience the uncanny valley, especially with regards to sex robots. These men are going to be the early adopters. Men are worse at identifying faces than women and are far more likely to have prosopagnosia, the inability to recognize faces.
Sex is weird. Sex is gross and awkward. Natural selection addressed this issue by causing arousal to attenuate the human disgust response. It’s worth noting that men have a much lower baseline sexual disgust than women, and that sexual excitement further reduces disgust sensitivity in men. In a classic paper by Dan Ariely, aroused men had much more positive attitudes about all kinds of unusual sexual acts. Sexually aroused men were more likely to say that it would be fun to watch a woman urinating or that they could imagine getting sexually excited by contact with an animal). 3-D pornography of video game or cartoon characters that might be creepy in a nonsexual context are popular genres. The most direct evidence that men won’t be put off by uncanny vulvas is from a paper that laments the “unabashed sexualization of female-gendered robots” in comments on YouTube videos of robots. Bawdy comments on gynoids – “you’ll have to replace it monthly due to semen corrosion,” for example – were more frequent than comments expressing unease.
Perhaps we should encourage some men to use sex robots. Men who get environmental cues that they’re evolutionary dead-ends disproportionately menace society. In the 1980s, evolutionary psychologist couple Wilson and Daly found that perpetrators of violence and homicide had something in common: they were young, single and didn’t have access to the kinds of resources with which to win mates. Polygynous societies in which wealthier men have access to multiple women are more violent and less stable because they have a class of young men without the prospect of getting a mate. Monogamy, rather than being the state of nature, may have been an important cultural technology for reducing violence.
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April 25, 2018
Tank vs. Tank: Villers-Bretonneux, April 1918 | The Tank Museum
The Tank Museum
Published on 20 Apr 2018100 years ago, during the First World War, tank fought tank for the first time in history, at Villers-Bretonneux on 24 April 1918.
It was an engagement that foreshadowed one hundred years of tanks fighting tanks on the battlefield, stories told by The Tank Museum.
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