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dunmalg

357 karma · joined October 7, 2009

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dunmalg··on Welders set off Beirut blast while securing explosives
Some theorize that the ammonium nitrate was already being sold off bit by bit on he black market as the harder to procure half of ANFO, and for a lot more than farmers would be willing to pay. Even carting off 500kg a week, after 4 years when 2750 tons turned into 2650, would anyone notice?
dunmalg··on Foursquare Merges with Factual
No, Instagram is missing the fundamental focus that makes something a "check-in app", i.e. a data presentation hierarchy where "I am at (specific place)" is on top. Instagram's top level of data is "I have picture".
dunmalg··on Foursquare Merges with Factual
>useless coins

A dozen or so members of my family use Swarm just as a casual "look where I am"/"look what I'm eating" thing, but I just cannot fathom what they were thinking with the evolution of the coins thing. Currently, the only thing you can do with coins is buy multipliers that... get you more coins? Wait, what's the point again?

dunmalg··on Letting slower passengers board airplane first is faster, study finds
>I've always wondered why this is desirable

Others have noted other reasons, but I think the biggest reason is that 1st/business class seats are more comfortable than the crappy crowded boarding area. Economy seats, it's the other way around. And as an added bonus, on something like a 787 where the boarding doors are behind business class, boarding first means you're lounging around in the front of the plane being served drinks and addressed by name while behind you the rabble are are being herded like cattle into their tiny seats at the back.

For 3x the price, 1st/business class want luxury, and sitting elbow to elbow with the riffraff in beat up terminal seating isn't that.

dunmalg··on A former Egyptian engineer found the secret to building a big gas-station chain
>Sheetz has 600+ locations and does $8b a year. All corporate owned and operated

600+ seems like a big number until you consider that there are 168,000 gas stations in the US. Large chains have a LONG way to go until they are more than a statistical blip, and this doesn't even take into account the fact that the federal government has, for over a century, cast a very jaundiced eye at any single entity using its market presence to drive competitors out of the retail gasoline business via undercutting on prices. Looking at the FTC ruling on the acquisition of Sunoco's fuel retail locations by 7-11, they monitor competition in fuel retailing VERY closely, to the point of mandating a certain degree of competition in specific markets.

https://www.ftc.gov/news-events/press-releases/2018/03/ftc-a...

dunmalg··on A former Egyptian engineer found the secret to building a big gas-station chain
> can a guy who owns a few dozen stores compete with chains that own hundreds?

With the exception of places like Costco and large truck stops, the vast overwhelming majority of gas stations are franchises where the owner is just some local guy selling under the Chevron or Shell or whatever name. This has some promotional value, of course, but the owner sets the prices just like any other station operator. Ultimately, they all buy fuel from the same local refineries or wholesalers, regardless of the name on the fuel truck that delivers it.

Standard Oil encountered some legal issues back in 1911 by using its size and vertical integration to undercut competitors at the retail level. As a result the petroleum production industry is now intentionally very much NOT involved in retail fuel sales.

dunmalg··on A former Egyptian engineer found the secret to building a big gas-station chain
>charging at night at home is cheaper today, only because power company makes it so.

They make it so because there's excess capacity at night, when most everyone is asleep. This is not an arbitrary decision.

>Ideally cars should charge when the sun is up, in day time

That's not even remotely true. Someday MAYBE, if massive solar deployment shifts our excess capacity from night to daytime, but that's certainly not the case right now.

dunmalg··on Heliogen, backed by Gates, says it has achieved a solar breakthrough
Yeah, the use of "AI" terminology is dubious here. They've replaced aiming via a pre-loaded ephemeris with a system that actually aims the reflected light by looking at where the light is ending up after being reflected and adjusting accordingly. There may be some machine learning going on in the sensing, but this feels an awful lot like basic feedback loop automation.
dunmalg··on How I automate my home
>what's your rationale for putting the "smarts" in the bulb and not the switch

People are afraid of electricity and don't want to replace a switch. Anyone can replace a light bulb though, so it's default solution for the kind of person that doesn't own a screwdriver. It's definitely an inferior approach, but I suppose it fulfills the needs of a certain segment of the market.

dunmalg··on The impact of cannabis access laws on opioid prescribing
One might say the same thing about building a significant degree concern based upon random anecdotes.
dunmalg··on The StingRay Is Why the 4th Amendment Was Written (2017)
I'd say it's less a "choice" than an "oversight". SIM cards solve the problem of "how do we know if Random Phone is attached to an account and the bill is paid?" The question of "how does the phone know it's talking to a real tower" was never even ASKED, as the very idea would have seemed preposterous.
dunmalg··on Monty Hall Problem
>depending on Monty's motivations, his knowledge, and the way he decides what information to give you.

The missing piece of the puzzle that seems to frequently be left out is we KNOW Monty's motivations, knowledge, and how he decides. At the time the problem was formulated, when Let's Make a Deal was still on television, all this was common knowledge: Monty is the host of a game show, he knows where the two goats and the car are, and he decides which door to open by picking one of the unchosen doors he KNOWS has a goat behind it. The problem suffers now, 40-odd years later, by the fact that people often don't know who Monty Hall IS, and the problem is usually worded as if it's still 1963-1976, so this foundational knowledge is missing. There is no QUESTION what Monty Hall knew, or what his motivation on the show was... except people who don't know the game show don't know that.

Granted, the actual game show was a bit more varied, but the presumption in the thought experiment is that Monty ISN'T trying to goad you into un-choosing the correct door, which he frequently did on the show because the tragedy of it was more entertaining than just giving away a car.

dunmalg··on The Fallacy That Is Cryptocurrency
Twenty US dollars is just "money", an agreed upon medium of exchange. A twenty dollar bill is currency, i.e. a physical token representing that amount of money.
dunmalg··on Murder by Rifle vs. Death by Meteor
"Killed by someone" isn't "killed by yourself", so suicide isn't part of that. Also GP poster is referring to being murdered by someone using a RIFLE, not just someone using a firearm in general.
dunmalg··on Murder by Rifle vs. Death by Meteor
Firearm designed to be fired from the shoulder, with a rifled barrel minimum of 16" long, and an overall length minimum of 26".

Rifles are defined more by what they AREN'T than what they ARE. "Shoulderable", "rifled barrel", 16", and 26" are the points where the federal government classifies a firearm as something different, such as a shotgun or a handgun.

dunmalg··on The boy behind the biggest coin-op conversion of the 80s
Back then, it didn't even help much to have the original assets. I worked in-house for a company porting some of their early EGA graphics PC games to the C64, and I just had to basically do everything from scratch. I could look at the original source code and art assets, but I was writing 6502 C64 assembly and the original was MSDOS 8088, with absolutely no commonality. Even the art-- I had to be my own artist-- was a tremendous chore. Downgrading 16px16px8 color EGA "tiles" to C64 8x16x4 color sprites when the 8 pixels were double width and one of the 4 colors was "transparent" was frequently an exercise in frustration. At one point I hollered at my boss that "I can't make a duck out of this!" (attempting to create a mallard flapping its wings) and went home early. I came back the next say and made a duck, but only barely. I eventually quit to work on my engineering degree. Never regretted it for a moment. A lot of us got really burned out back then.
dunmalg··on The Necessity of Nuclear
It takes a very specific design of breeder reactor to make weapons grade plutonium. Proliferation concerns are a red herring by anti-nuclear activists who intentionally conflate non-weapons grade plutonium with weapons grade to make ALL breeders sound dangerous.
dunmalg··on Why older people should be allowed to change their legal age
The devil is in the details of the implementation, though. If we discard age for a system of "achievement unlocked" style phases, who will be in charge of evaluating and approving these phase decrees? Subjecting an entire population to a potentially capricious bureaucracy to deal with a handful of edge cases seems like swatting flies with a 2x4.
dunmalg··on Ken Thompson's Unix Password
No, it's generally not illegal to copy someones key. It's illegal to STEAL the key, of course, but copy? Not a crime. Some states have laws that prohibit "providing access" to a government facility which can be applied to copying government keys, but your house key? Nope.

SOURCE: am locksmith

dunmalg··on Decades of diesel use in Europe have created a public health crisis
>Presumably this mostly comes from the steel wheels on steel track

Highly unlikely. Steel-on-steel is used because it lasts for YEARS without needing replacing due to wear.

dunmalg··on EASA demands additional changes for the 737 Max
>As a for instance, what happens if a dual flameout in flight occurs? Does the Ram Air Turbine make enough power to run the Flight Control Computer and all it's dependencies to ensure the MCAS functionality stays intact until the plane can be safely touched down?

Isn't MCAS a solution to address greater nose pitch-up due to stronger thrust vectoring effects from the new engines? In a dual engine flameout where all thrust is lost, doesn't thrust vectoring cease to be an issue?

dunmalg··on Truckers Reap New Riches
The US already moves over 40% of its total hauled tonnage by rail, more than twice that of the next largest economic entity, the EU, which is pushing about 20%. Long haul trucking isn't just competitive because the "subsidy" of not being banned from the federal interstate highway system. Pretty much all the freight that can be economically shipped by rail already is. Rail is inflexible and requires substantial investment in fixed infrastructure to add terminals. Intermodal facilities frequently add so much difficulty at both ends that it's often simpler and faster just have one truck drive 300 miles than to run a trailer 100 miles, piggyback by rail 200 miles, then another truck run the trailer from the intermodal terminal 100 miles to the destination. Charging trucks a toll to use the interstate or whatever isn't going to make rails magically appear over steep mountainous areas in the western US, or bridges for parallel tracks materialize over all the rivers and streams in the midwest/south, or new rights of way appear through the densely populated northeast. It's not like government sugar tariffs and corn subsidies combining to perversely make corn syrup cheaper than sugar. Rail and truck transport fill different niches and are both necessary to a functioning transport network.
dunmalg··on How the pilots of Lion Air Flight 610 lost control
>Maybe the pilots did not receive proper sim time on a 737MAX, which I believe has different enough instrumentation and automation systems to require a separate sim from the standard 737

Isn't part of Boeing's marketing strategy that the 737MAX actually DOESN'T require additional training? The entire point of MCAS is to make the larger 737MAX react to control inputs just like a smaller 737, so flight crew can just fly them all "like a 737".

dunmalg··on Study Reveals U.S. Consumers and Economy Lose Billions to Occupational Licensing
>the problem is licensing, once implemented, is almost never critically reexamined and regularly gets pushed for more difficult requirements regardless of those requirement's efficacy or results.

There's also the "license fee" treadmill, where the state sees an easy way to get more money from a captive audience by raising fees. For example in California this year the license renewal fee for being a locksmith went from $45 to $500 every 3 years, and it's still just a paper card they mail you that certifies that you sent them a form and a fingerprint livescan once, usually many years ago.

dunmalg··on Boeing Withheld Information on 737 Model, According to Safety Experts and Others
>are you sure its clutch safety switch is actually working?

If the clutch switch was inoperative and the cruise control was engaged, the cruise would not know the engine is disengaged from the transmission and would rev the engine up to redline.

dunmalg··on The Growth of Reddit
Not signing in to reddit is the surest way to experience the online equivalent of a table next to the bathroom.
dunmalg··on Worst Computer Bugs in History: Therac-25 (2017)
>the Hyatt bridge collapse a year earlier was a couple of orders of magnitude worse (114 people, https://en.m.wikipedia.org/wiki/Hyatt_Regency_walkway_collap...) from what was also a fairly subtle engineering failure.

It wasn't subtle at all. The entire design was substandard to begin with and didn't meet code. Suspending a walkway from a piece of square tubing made by welding two pieces of C-channel together was ALREADY pants-on-head retarded, and undersized to boot. Deciding it's OK to hang the lower span off the upper span's substandard tubing was just the last step in a long chain of gross engineering negligence.

Calling it a "subtle" failure is like calling Challenger subtle because it was "just a leaky O-ring", or the Apollo I fire subtle because it was "just a tiny spark". There was a completely avoidable cascade of multi-level failure leading up to all of them.

dunmalg··on Juicero Is Shutting Down
Actually, ANY coffee brewed in a proper machine is going to be better than keurig, even from a Dunkin Donuts. Coffee needs three things to be ok: recently roasted grounds in suffice quantity, hot enough water, and long enough brew time. You can skimp on one of those three and still get barely passable coffee. Fall short of two of those marks and the coffee is crap water. Keurig machines fail at all three. The only redeeming quality of Keurig is a convenient single serving format.
dunmalg··on North American F-82 Twin Mustang
>you can afford to field 2,700 Furies against that F-22

You can't just divide the cost of a Fury into the cost of an F-22 and assume that's even remotely reasonable as a fieldable proportion. The limiting factor isn't the cost of building the planes, it's the logistics of coming up with with enough fuel, pilots, maintenance, and ground facilities to keep them flying. There's nobody who couldn't afford something better that could afford to field maybe 3:1 vs the F-22.

The salesman for Burt Rutan's little gun-armed midget ARES fighter/attack plane liked to tell people to "imagine how the Falklands War would have been different" if the British Harriers had been faced with waves of hundreds of ARES planes.... completely failing to address the fact that Argentina couldn't possibly train enough qualified pilots to sit in those hundreds of cockpits.

dunmalg··on North American F-82 Twin Mustang
Yeah, the P-38 was a decent design, but it's very much a 1930's era plane with its oval pattern wings and control surfaces. The P-51, despite technically only be a couple years newer than the P-38, incorporated a LOT of improvements, most notably those in the 1940 NACA study data. The laminar flow wing alone pushed the P-51 well beyond anything else produced previously. The P-51 was arguably the first line fighter to be designed with aerodynamics based on hard science, rather than seat of the pants "this seemed to work before" design practices.
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