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The Largest Ship In the World Is Being Built In Korea

hackertourist Re:Fun facts (243 comments)

I checked the MAN 'giant marine diesel' portfolio: they offer 4 different stroke lengths, with rpm ranges that top out at 72 rpm for the longest-stroke version.

5 hours ago
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The Largest Ship In the World Is Being Built In Korea

hackertourist Re:Fun facts (243 comments)

Industry-specific units of measurement rarely serve any purpose other than to befuddle outsiders. We decided on an actual standard long ago, these nautical types need to get with the times.

5 hours ago
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An Algorithm to End the Lines for Ice at Burning Man

hackertourist Re: Agner Krarup Erlang - The telephone in 1909! (260 comments)

For grocery stores (and other shops where you'd buy a large number of items in one go) the single line is less convenient for the customer.
I like being able to stack all of my groceries onto the conveyor before the cashier starts processing them. When the cashier gets to my groceries, I can immediately start packing them (in the right order, heavy items first).
In a single-line system, you're inevitably still unpacking while the cashier processes your item, so they all end up in a mangled heap at the end of the conveyor belt.

6 hours ago
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The Largest Ship In the World Is Being Built In Korea

hackertourist Re:waste of effort (243 comments)

Large pods would just move the inefficiencies elsewhere. You'd have to load the ISO containers into these pods, then load the pods onto a ship.
You can't reliably transfer these pods at sea, so you'll have to do this in port anyway, so your system won't result in shorter routes.
Smaller ships are less efficient than large ships: the longer a ship gets, the more efficient its propulsion system gets. You also get other economies of scale (less crew, for instance).

7 hours ago
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The Largest Ship In the World Is Being Built In Korea

hackertourist Re:Largest single emitter of CO2 on Earth? (243 comments)

The CO2 emissions have little to do with impurities in the fuel. They emit so much CO2 because they require a lot of power for propulsion. The Triple-E is a lot more efficient than the previous generation of ships, so CO2 emissions are some 20% lower despite carrying more containers.

10 hours ago
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The Largest Ship In the World Is Being Built In Korea

hackertourist Fun facts (243 comments)

The Triple-E is unusual in several aspects apart from its size.
1. It has 2 engines instead of one. This improves packaging (less volume lost to the engine room), mainly because the engines are shorter (8 cylinders in line instead of 14). Earlier ships had one engine to reduce complexity.
2. It's slower, with an operational speed of 35 km/h (down from 45 km/h of its predecessor). This saves fuel.

12 hours ago
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The Largest Ship In the World Is Being Built In Korea

hackertourist Re:Ho-lee-crap (243 comments)

Discovery Channel aired a series of programmes on this project last year. IIRC the main shipyard can house 2 or 3 of these in parallel, not 13. Each ship spends only a few months in this yard (final assembly only). Delivery tempo is one a month.
Modules are built at various other shipyards.

12 hours ago
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JavaScript and the Netflix User Interface

hackertourist Re:What browser apps need.. (186 comments)

You can thank Microsoft for that moronic decision. It's also in e.g. Outlook. Why you would want to map a key that's universally used to delete stuff, to act as "go to the previous view" (and worse, swap between the two behaviors depending on focus) is beyond me.

yesterday
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Firefox 33 Arrives With OpenH264 Support

hackertourist Re:Meanwhile, on Pale Moon (113 comments)

Over the past few years, the Mozilla foundation hasn't given the impression it'll listen to user feedback at all. If the rivers of vitriol over the Australis UI changes haven't had any effect, why would I bother giving them one more data point?

5 days ago
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Firefox 33 Arrives With OpenH264 Support

hackertourist Re:Meanwhile, on Pale Moon (113 comments)

I used Firefox with Classic Theme Restorer before moving to Pale Moon. CTR helps, but it wasn't able to undo all of the crappiness that Australis brought. For example, the new tab design in Australis meant that very narrow tabs (anything below ~60 px) didn't work well anymore. I used the Custom Tab Width extension to adjust the minimum tab width. After Australis, there would be a ghost region around each tab, making the tabs overlap each other.
CTR also didn't bring back the Status bar. Having status text overlap the main window is annoying.

5 days ago
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Firefox 33 Arrives With OpenH264 Support

hackertourist Meanwhile, on Pale Moon (113 comments)

After the Australis debacle I decided to move my Windows machines to Pale Moon. The change has been surprisingly painless, I could pretty much copy my Firefox profile wholesale without a hitch. All of the extensions work too and the interface is such a relief.
Now to find something similar for my Mac...

about a week ago
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Too Much Privacy: Finnish Police Want Big Euro Notes Taken Out of Circulation

hackertourist Welcome to the Eurozone (314 comments)

I wonder if the Finns can unilaterally decide that the 200/500 Euro notes are no longer legal tender in their country. Then again, maybe they don't have to. Many stores over here (.nl) already don't accept large denominations.

about a week ago
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The Cult of Elon Musk Shines With Steve Jobs' Aura

hackertourist Re:I'm OK with this (181 comments)

I don't get it. Why the downplaying of Jobs' achievements? Yes, yes, asshole, RDF, marketing, design, blah blah blah. Whatever.
1. Jobs led the team that developed the Macintosh: the first GUI-driven computer that had more than niche appeal. He changed the face of computing and everyone in the field furiously struggled to badly copy the Mac for the next decade or so. This made computing accessible to the masses, where previously the CLI had been a pretty big barrier for consumers.
2. He introduced the first MP3 player that actually worked well. Billions sold, total market domination etc.
3. He introduced the first smartphone that worked well. Billions sold, total market domination etc.
Do you get the pattern yet? Innovation is not just about designing hardware. Designing a comprehensible interface is a major achievement in its own right.

Jobs made computing accessible to the average man. If I were to exaggerate as much as the parent: Musk just makes cheap rockets and expensive cars.

about a week ago
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Tesla Announces Dual Motors, 'Autopilot' For the Model S

hackertourist Re:73% tax return (283 comments)

First, it's not a return, and second, how do you arrive at 73%?

You pay no BPM. This is a tax on cars, which used to be 20-30% of the before-tax purchase price, now it's calculated based on a car's CO2 emissions, you pay something like â70 per gram of CO2. For typical cars, this still adds up to 20-30% of the purchase price.

about two weeks ago
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Maps Suggest Marco Polo May Have "Discovered" America

hackertourist Re:Because of european perspective (276 comments)

I'd say being able to spread the knowledge of your discovery is an important part of that discovery. After the Vikings reached America, one tribe knew about the discovery and it was subsequently forgotten. After Columbus discovered America, this knowledge spread throughout Europe.

about two weeks ago

Submissions

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Power grid demand matching using flywheels

hackertourist hackertourist writes  |  more than 3 years ago

hackertourist writes "A novel type of electricity storage was recently added to the New York power grid. The unit, supplied by Beacon Power uses flywheels to store energy. The unit is intended to replace gas turbines in supplying short-term peaks in power demand (also known as frequency regulation). It can supply up to 20 MW, using 200 flywheels."
Link to Original Source

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