TheCuriousEngineer
Published on 5 Oct 2014Do you know how the early sailors navigate the oceans? The technology today makes it real easy to navigate the oceans. But it’s very interesting to know how the early sailors managed to navigate without it. There’s a lot of history on it. I tried my best to compile some important and interesting parts of it into this video. Hope you like it 🙂
August 1, 2018
How did early Sailors navigate the Oceans? | The Curious Engineer
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July 30, 2018
Forgotten History: World’s Biggest Black Powder Cannon – a 100-Ton Gun
Forgotten Weapons
Published on 10 Jul 2018http://www.patreon.com/ForgottenWeapons
The largest muzzleloading black powder cannons ever built were the Armstrong 100-ton guns which saw service with the Italian Navy and with British coastal fortifications on Malta and Gibraltar. They were purchased by the Italians first, to outfit a pair of new super battleships, each vessel having two turrets with two of these guns in each. To avoid being outclassed, the British ordered two guns for installation to protect the Grand Harbor of Malta and two more to protect Gibraltar. Today one survives at each location, and we are visiting the Rinella Battery in Malta, which was built to house one of the Maltese guns.
These guns had a maximum range of 8 miles, and was capable of piercing 15 inches of iron armor at 3 miles. It had a 17.7 inch (45cm) bore fired a 2000 pound (900 kg) shell with a 450 pound (200kg) charge of black powder. The gun itself weighed approximately 102 tons, and with its cradle and a shell the whole assembly came in at 150 tons.
Aside from the massive scale of the piece, the most interesting part of its design is actually the loading machinery. Because of the titanic size of the gun and ammunition, Armstrong designed a fascinating hydraulic reloading facility which makes up the body of the fortress in which the gun is set. A pair of steam engines drove a pair of hydraulic accumulators, which provided hydraulic pressure to move the gun on its carriage, to douse the barrel after firing, to hoist ammunition into position for loading and power a 60-foot (18m) ramrod to mechanically ram the charge and shell into place. Two mirror-image reloading galleries under the fortification operated in turn, giving the gun a sustained rate of fire of 1 round every 6 minutes – at least until its 120-round barrel life was exhausted.
I am grateful for the Malta Tourism Authority’s assistance in helping to make this visit and video possible, and would also like to give special thanks to Simon, our awesome reenactor guide!
If you enjoy Forgotten Weapons, check out its sister channel, InRangeTV! http://www.youtube.com/InRangeTVShow
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July 29, 2018
A poor tank, a useless tank, and the worst tank in the world
Lindybeige
Published on 10 Jul 2018Tigers? Why talk about Tigers when one can talk about tanks that were even worse? More tank banter with The Chieftain.
Support me on Patreon: https://www.patreon.com/LindybeigeA low-tech tank with fragile armour, a tank that never saw the enemy, and the tank used to teach how not to build tanks. Thanks to Nicholas Moran (AKA The Chieftain) and Matt Sampson, the cameraman at Bovington Tank Museum.
The third of these three segments was shot with my new camera, and it really shows.
Lindybeige: a channel of archaeology, ancient and medieval warfare, rants, swing dance, travelogues, evolution, and whatever else occurs to me to make.
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July 24, 2018
QotD: Passwords
It makes no sense to force users to generate passwords for websites they only log in to once or twice a year. Users realize this: they store those passwords in their browsers, or they never even bother trying to remember them, using the “I forgot my password” link as a way to bypass the system completely — effectively falling back on the security of their e-mail account.
Bruce Schneier, “Security Design: Stop Trying to Fix the User”, Schneier on Security, 2016-10-03.
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July 21, 2018
Singapore suffers data breach from SingHealth
In the Straits Times, Irene Tham reports on the data loss:
In Singapore’s worst cyber attack, hackers have stolen the personal particulars of 1.5 million patients. Of these, 160,000 people, including Prime Minister Lee Hsien Loong and a few ministers, had their outpatient prescriptions stolen as well.
The hackers infiltrated the computers of SingHealth, Singapore’s largest group of healthcare institutions with four hospitals, five national speciality centres and eight polyclinics. Two other polyclinics used to be under SingHealth.
At a multi-ministry press conference on Friday (July 20), the authorities said PM Lee’s information was “specifically and repeatedly targeted”.
The 1.5 million patients had visited SingHealth’s specialist outpatient clinics and polyclinics from May 1, 2015, to July 4, 2018.
Their non-medical personal data that was illegally accessed and copied included their names, IC numbers, addresses, gender, race and dates of birth.
No record was tampered with and no other patient records such as diagnosis, test results and doctors’ notes were breached. There was no evidence of a similar breach in the other public healthcare IT systems.
Health Minister Gan Kim Yong and Minister for Communications and Information S. Iswaran both described the leak as the most serious, unprecedented breach of personal data in Singapore.
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July 20, 2018
Fiat currency and the impact of cryptocurrencies
At Catallaxy Files, Sinclair Davidson explains some of the advantages and disadvantages of both fiat (government-issued) and private currency:
As George Selgin, Larry White and others have shown, many historical societies had systems of private money — free banking — where the institution of money was provided by the market.
But for the most part, private monies have been displaced by fiat currencies, and live on as a historical curiosity.
We can explain this with an ‘institutional possibility frontier’; a framework developed first by Harvard economist Andrei Shleifer and his various co-authors. Shleifer and colleagues array social institutions according to how they trade-off the risks of disorder (that is, private fraud and theft) against the risk of dictatorship (that is, government expropriation, oppression, etc.) along the frontier.
As the graph shows, for money these risks are counterfeiting (disorder) and unexpected inflation (dictatorship). The free banking era taught us that private currencies are vulnerable to counterfeiting, but due to competitive market pressure, minimise the risk of inflation.
By contrast, fiat currencies are less susceptible to counterfeiting. Governments are a trusted third party that aggressively prosecutes currency fraud. The tradeoff though is that governments get the power of inflating the currency.
The fact that fiat currencies seem to be widely preferred in the world isn’t only because of fiat currency laws. It’s that citizens seem to be relatively happy with this tradeoff. They would prefer to take the risk of inflation over the risk of counterfeiting.
One reason why this might be the case is because they can both diversify and hedge against the likelihood of inflation by holding assets such as gold, or foreign currency.
The dictatorship costs of fiat currency are apparently not as high as ‘hard money’ theorists imagine.
Introducing cryptocurrencies
Cryptocurrencies significantly change this dynamic.
Cryptocurrencies are a form of private money that substantially, if not entirely, eliminate the risk of counterfeiting. Blockchains underpin cryptocurrency tokens as a secure, decentralised digital asset.
They’re not just an asset to diversify away from inflationary fiat currency, or a hedge to protect against unwanted dictatorship. Cryptocurrencies are a (near — and increasing) substitute for fiat currency.
This means that the disorder costs of private money drop dramatically.
In fact, the counterfeiting risk for mature cryptocurrencies like Bitcoin is currently less than fiat currency. Fiat currency can still be counterfeited. A stable and secure blockchain eliminates the risk of counterfeiting entirely.
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Tank Chats #33 Panzer III | The Tank Museum
The Tank Museum
Published on 11 Mar 2017The thirty-third Tank Chat, this time presented by Curator David Willey. Including a fascinating insight into pre-Second World War German tank production and how the Panzer III worked alongside its fellow Panzers.
To find out more, buy the new Haynes Panzer III tank manual. https://www.myonlinebooking.co.uk/tan…
The Panzer III was conceived in 1934 as the principle combat tank of the Panzer divisions. The Museum’s Panzer III went into action in the North African theatre of war and is believed to have been captured at the Battle of Alam Halfa.
Support the work of The Tank Museum on Patreon: ► https://www.patreon.com/tankmuseum
Or donate http://tankmuseum.org/support-us/donate
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July 17, 2018
Juul threat
John Tierney on the good news/bad news in the most recent smoking statistics in the United States:
Tobacco-company stocks have plunged this year — along with cigarette sales — because of a wonderful trend: the percentage of people smoking has fallen to a historic low. For the first time, the smoking rate in America has dropped below 15 percent for adults and 8 percent for high school students. But instead of celebrating this trend, public-health activists are working hard to reverse it.
They’ve renewed their campaign against the vaping industry and singled out Juul Labs, the maker of an e-cigarette so effective at weaning smokers from their habit that Wall Street analysts are calling it an existential threat to tobacco companies. In just a few years, Juul has taken over more than half the e-cigarette market thanks to its innovative device, which uses replaceable snap-on pods containing a novel liquid called nicotine salt. Because the Juul’s aerosol vapor delivers nicotine more quickly than other vaping devices, it feels more like a tobacco cigarette, so it appeals to smokers who want nicotine’s benefits (of which there are many) without the toxins and carcinogens in tobacco smoke.
It clearly seems to be the most effective technology ever developed for getting smokers to quit, and there’s no question that it’s far safer than tobacco cigarettes. But activists are so determined to prohibit any use of nicotine that they’re calling Juul a “massive public-health disaster” and have persuaded journalists, Democratic politicians, and federal officials to combat the “Juuling epidemic” among teenagers.
The press has been scaring the public with tales of high schools filled with nicotine fiends desperately puffing on Juuls, but the latest federal survey, released last month, tells a different story. The vaping rate last year among high-school students, a little less than 12 percent, was actually four percentage points lower than in 2015, when Juul was a new product with miniscule sales. As Juul sales soared over the next two years, the number of high-school vapers declined by more than a quarter, and the number of middle-school vapers declined by more than a third — hardly the signs of an epidemic.
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July 13, 2018
How It’s Made: Laminated Wood Beams
Al Hilli
Published on 25 Apr 2013
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July 12, 2018
“And that is how the Flat Century dies. Upstairs, downstairs isn’t just our past, it’s our future”
ESR looks in his crystal ball and finds a much less egalitarian future lurking just ahead of us:
I think we all better hope we get germ-line genetic engineering and really effective nootropics real soon now. Because I think I have seen what the future looks like without these technologies, and it sucks.
A hundred years ago, 1918, marked the approximate end of the period when even middle-class families in the U.S. and Great Britain routinely had servants. During the inter-war years availability of domestic servants became an acute problem further and further up the SES scale, nearly highlighted by the National Council on Household Employment’s 1928 report on the problem. The institution of the servant class was in collapse; would-be masters were priced out of the market by rising wages for factory jobs and wider working opportunities for women (notably as typists).
But there was a supply-side factor as well; potential hires were unwilling to be servants and have masters – increasingly reluctant to be in service even when such jobs were still the best return they could get on their labor. The economic collapse of personal service coincided with an increasing rejection of the social stratification that had gone with it. Society as a whole became flatter and much more meritocratic.
There are unwelcome but powerful reasons to expect that this trend has already begun to reverse.
[…]
But now it’s 2018. Poverty cultures are reaching down to unprecedented levels of self-degradation; indicators of this are out-of-wedlock births, rates of drug abuse, and levels of interpersonal violence and suicide. Even as American society as a whole is getting steadily richer, more peaceful and less crime-ridden, its lowest SES tiers are going to hell in a handbasket. And not just the usual urban minority suspects, either, but poor whites as well; this is the burden of books like Charles Murray’s Coming Apart. J. D. Vance’s Hillbilly Elegy, and the opioid-abuse statistics.
It’s hard not to look at this and not see the prophecies of The Bell Curve, a quarter century ago, coming hideously true. We have assorted ourselves into increasing cognitive inequality by class. and the poor are paying an ever heavier price for this. Furthermore, the natural outcome of the process is average IQ and other class differentiating abilities abilities are on their way to becoming genetically locked in.
The last jaw of the trap is the implosion of jobs for unskilled and semi-skilled labor. Retail, a traditional entry ramp into the workforce, has been badly hit by e-commerce, and that’s going to get worse. Fast-food chains are automating as fast as political morons pass “living wage” laws; that’s going to have an especially hard impact on minorities.
But we ain’t seen nothing yet; there’s a huge disruption coming when driverless cars and trucks wipe out an entire tier of the economy related to commercial transport. That’s 1 in 15 workers in the U.S., overwhelmingly from lower SES tiers. What are they going to do in the brave new world? What are their increasingly genetically disadvantaged children going to do?
Here’s where we jump into science fiction, because the only answer I can see is: become servants. And that is how the Flat Century dies. Upstairs, downstairs isn’t just our past, it’s our future. Because in a world where production of goods and routinized service is increasingly dominated by robots and AI, the social role of servant as a person who takes orders will increasingly be the only thing that an unskilled person has left to offer above the economic level of digging ditches or picking fruit.
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Infrastructure has costs as well as benefits
Tim Worstall makes a sensible point that applies (to a greater or lesser extent) to most of these “we’re dropping down the league tables in telecommunications” stories:
The Daily Mail is reacting with horror to the thought that the UK has slipped down the broadband tables. We’re only 35th in the world for average speed now! The correct answer to which is that yes, of course the UK’s broad band speeds are slow, we’re a developed and rich country. Which doesn’t mean that yes we’ll have the latest in shiny infrastructure. Rather, it means that we put in infrastructure some time ago and thus have the infrastructure from some time ago. You know, having infrastructure being one of the things which makes you a rich and developed nation?
Britain has slipped four places in the world broadband speed league, leaving its network lagging well behind the likes of Latvia, Lithuania, Hungary and Romania.
The UK is the sixth largest economy in the world but has dropped to 35th in the rankings after being overtaken by France and even Madagascar, according to the latest analysis.
As other countries rush to install fibre-optic cable networks which are capable of providing superfast download speeds, much of Britain continues to rely on old copper telephone wires to connect homes to the web.
Well, yes, the point being that we had a copper based network which went to pretty much everywhere. Thus we’ve not rushed to put in the fibreoptic because we’ve actually not needed it. Hey, sure, maybe it would be nice. Maybe it’s something we will install everywhere in the future. But we’ve not done it as yet because there’s not been a pressing case for that investment.
You see, our forebears already invested in the copper for us.
As a general rule of thumb, the earlier you invested in your telecommunications network, the slower it will be compared to current technology. At some point, it becomes economical to replace the installed network, but as long as the existing infrastructure is providing a profit, there isn’t the sense of urgency that most of these “the sky is falling” articles imply.
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July 11, 2018
Environmentalists against science
At Catallaxy Files, Jeff Stier looks at situations when activists who normally fetishize their devotion to science will go out of their way to fight against scientific findings that don’t co-incide with their preferences:
The debate over regulation often devolves into a debate about “too little” versus “too much” regulation, split along the ideological divide. Too little regulation, goes the argument, and we are exposed to too much risk. Too little, and we don’t advance.
This binary approach, however, represents the dark-ages of regulatory policy. It was more frequently relevant when our tools to measure risk were primitive, but today’s technology allows much more precise ways to evaluate real-world risks. With less uncertainty, there’s less of a need to cast a broad regulatory net.
Regulation not warranted by countervailing risk just doesn’t make sense. That’s why a pseudoscientific approach, dubbed the “precautionary principle,” behind much of today’s regulation is so pernicious. This dogma dictates that it’s always better to be safe than to ever be sorry. The approach is politically effective not only because it’s something your mother says, but because it’s easier to envision potential dangers, remote as they may be, than potential benefits. Uncertainty, it turns out, is a powerful tool for those who seek to live in a world without risk.
But what happens when regulators can get a reasonably good handle on benefits and risks? Some potential risks have been eliminated simply because the basis for the concern has proven to be unwarranted. For more than two decades, the artificial sweetener, saccharin, came with a cancer warning label in the U.S.But it turned out that the animal experiment which led to the warning was later found to be irrelevant to humans, and the warning was eventually removed.
Warning about a product when risks are not well-understood is prudent. But it would be absurd to continue to warn after the science tells us there’s nothing to worry about.
Today, an analogous situation is playing out in the EU, where activists are using outmoded tests not just to place warning labels on silicones, a building block of our technological world, but to ban them outright.
The playbook is predictable: as the scientific basis for a product’s safety grows, opponents go to increasingly great lengths to manufacture uncertainty, move the goalposts and capitalize on scientific illiteracy to gain the political upper-hand.
We’ve seen these tactics employed in opposition to everything from growing human tissue in a lab, to harm-reducing alternatives to smoking, such as e-cigarettes. Now, the effort to manufacture uncertainty is playing out in the debate over the environmental impact of silicones, which are used to in a wide range of consumer, medical, and industrial products.
Fortunately, in the case of silicones, regulators in a number of countries, including Australia, have put politics aside and adhere to appropriate scientific methods to inform their decision-making.
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July 9, 2018
We used to joke about the “Pre-Fab Four”, but now every major artist is pre-fab
Not only pre-fabricated, but with a global audience that has been trained to like their music in advance. You could go so far as to say they’ve been brainwashed into liking it. ESR commented on this and shared the following video.
Not just a get-off-my-lawn rant, very exact information on how modern production techniques and producers’ economic incentives squeeze the life and variety out of popular music.
I actually didn’t know how bad it had gotten out there, I never hear any of this chart-topping crap because I select my music from niche genres without lyrics – instrumental prog metal, jazz fusion, space ambient. I thought that was just me, but maybe such strict selectivity is what one has to do to avoid being inundated in garbage these days.
July 5, 2018
Tales of Cromwell tanks
Lindybeige
Published on 6 Apr 2016War memoirs are filled with amazing anecdotes. Here I relate two, and ramble a bit about British WW2 tank units.
Support me on Patreon: https://www.patreon.com/LindybeigeI am likely to return to this topic – anecdotes from war memoirs. It is a rich vein of stories. These come from Troop Leader by Bill Bellamy, which describes the author’s time commanding a trio of fast Cromwell tanks in World War Two, when fighting the Germans in Holland.
Lindybeige: a channel of archaeology, ancient and medieval warfare, rants, swing dance, travelogues, evolution, and whatever else occurs to me to make.
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July 4, 2018
Open office plans do not increase personal interaction among workers
From the abstract of a recent study:
Example of an open plan office
Photo by VeronicaTherese via Wikimedia Commons.
Organizations’ pursuit of increased workplace collaboration has led managers to transform traditional office spaces into ‘open’, transparency-enhancing architectures with fewer walls, doors and other spatial boundaries, yet there is scant direct empirical research on how human interaction patterns change as a result of these architectural changes. In two intervention-based field studies of corporate headquarters transitioning to more open office spaces, we empirically examined — using digital data from advanced wearable devices and from electronic communication servers — the effect of open office architectures on employees’ face-to-face, email and instant messaging (IM) interaction patterns. Contrary to common belief, the volume of face-to-face interaction decreased significantly (approx. 70%) in both cases, with an associated increase in electronic interaction. In short, rather than prompting increasingly vibrant face-to-face collaboration, open architecture appeared to trigger a natural human response to socially withdraw from officemates and interact instead over email and IM. This is the first study to empirically measure both face-to-face and electronic interaction before and after the adoption of open office architecture. The results inform our understanding of the impact on human behaviour of workspaces that trend towards fewer spatial boundaries.
This certainly matches my own experiences working at companies that changed their offices to more open or fully open spaces. The accountants may have loved the new spaces as being less expensive, but one of the key advantages claimed for open designs does not appear to be true.
H/T to Claire Lehmann for the link.
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