jabl

23 ms·

361.
by jabl 2y ago
You're off by more than a thousand years..
362.
by jabl 2y ago
> But why all this effort to re-create a burial ship? Burial ships are generally how we have found out details of such old ships, as otherwise they'd have rotted away, or been chopped up, at the end of their lives. Similar to Viking
363.
by jabl 2y ago
One reason for the prevalence of all kinds of eco/hippie/etc hair salons is that many hairdressers develop allergies against all the chemicals they're working with.
364.
by jabl 2y ago
Sometimes I wonder about an alternative history scenario where CPU ISA's would have chosen a SIMT style model instead of SIMD. "Just" have something like fork/join instructions to start/stop vector mode, otherwise u
365.
by jabl 2y ago
There's a lot of rotations and stuff in QM, yes. That you should do it with quaternions is mostly an internet thing. I have a PhD in physics, and I never encountered quaternions in any course I took, and from seeing curricula in other
366.
by jabl 2y ago
If the person were a prisoner he wouldn't be carrying a rifle..
367.
by jabl 2y ago
Fiber, as in Fibre Channel (FC, https://en.wikipedia.org/wiki/Fibre_Channel ), not fiber as in "optical fiber" instead of copper cabling.
368.
by jabl 2y ago
Yes. Already during the Roman empire the Ruhr valley was denuded as the trees were cut down to make charcoal for iron making. With modern technology we can do better, e.g. torrefaction produces bio-coal with about 90% of the original energy
369.
by jabl 2y ago
That's sort-of the direction they're going with CUPS 3. The 'local server', which is what most people will need, runs as a normal user, not root, doesn't listen on the internet, and talks only the IPP everywhere pro
370.
by jabl 2y ago
Well it's your lucky day, they're working on rearchitecting cups to be, among other things, more secure. See https://ftp.pwg.org/pub/pwg/liaison/openprinting/presentatio...
371.
by jabl 2y ago
That was a long time ago. A decade or so ago Jim Meyering did experiments with a lot of allocators, and subsequently went on a spree removing NULL checks before free() in a lot free software toolchain projects (gcc, gdb, binutils, etc).
372.
by jabl 2y ago
I recall some optimization advice to choose a leading dimension that is NOT a power of two, in order to avoid cache set associativity conflicts. Guess it's highly hardware dependent (in particular, that advice was for cpu's not GP
373.
by jabl 2y ago
> And your comment is? Merely expression surprise at your statement, considering my experience is so different. I have no experience of 'luxury' yachts though, just regular sailing boats. So maybe those superyachts are differen
374.
by jabl 2y ago
Merely repeating your previous statement isn't helpful. Thanks.
375.
by jabl 2y ago
> Especially for sailing yachts, the exhaust is almost always wet (below the waterline). I've seen quite a few sailing yachts, but never one with the exhaust below the waterline. Pretty low yes (typically maybe 10-20cm above the wat
376.
by jabl 2y ago
Thanks to the square cube law, you can't linearly extrapolate the displacement from a 150m ship to a 54m one. Looking at some random ships in roughly that size one can see e.g. - https://en.wikipedia.org/wiki/Stavr
377.
by jabl 2y ago
> Also both of these (exhaust & intake) are not free to the inside of the vessel, but form a closed circuit with the engine, so there's no way to flood the vessel through those. Don't know about this yacht specifically, but
378.
by jabl 2y ago
> Flip-side, extending the keel would have changed the ship's draft from 4m to 10m. The ship was dragging its anchor. I don't have a chart of the waters the ship was in, but running its deep keel into the bottom could also have
379.
by jabl 2y ago
Yes, I saw that writeup linked to in the discussion earlier. I'm no naval architect, but I'd imagine for such a big boat an AVS of 90 degrees sounds reasonable. But a downflooding angle of only 40-45 degrees, that's just bonk
380.
by jabl 2y ago
> Self-righting yachts exist.[2] But they look like rescue boats with nicer interiors. > Many recreational sailboats have enough flotation to survive 90 degrees of roll, with the sails flat on the water. This is called a "knockdo
381.
by jabl 2y ago
Of course they did, after all humanity has been plying the seas for thousands of years. Just pointing out that naval architecture, as a branch of engineering involving stability calculations etc., is much younger than 500 years.
382.
by jabl 2y ago
> There is a very strong opposition against people smugglers in Europe. Many people are trying to stop them! There are protests in streets! The people that are protesting in the streets against this seem mostly motivated by xenophobia an
383.
by jabl 2y ago
Yes, the latest generation diesel engines have lower compression ration than engines from a couple decades ago. Maybe something like 16:1 instead of 19:1. But also exhaust gas recirculation: https://en.wikipedia.org/wiki&#x2
384.
by jabl 2y ago
Materials science has advanced quite a bit since the Preussen though. Aluminum, or even carbon fiber masts, rod standing rigging, Dyneema (UHMWPE) ropes, etc., all add up and drastically reduces weight. Not saying the Bayesian design was or
385.
by jabl 2y ago
> It does contain harmful compounds. It wouldn't work to prevent growth otherwise. Nowadays there exists bottom paints such as polysiloxane based ones that work by creating a very hard and smooth surface that critters find it very h
386.
by jabl 2y ago
I don't work in the maritime industry so I might easily be wrong, but my understanding is that these rules are generally enforced not via national laws directly but via insurance. You can build any kind of ship you like, but then you h
387.
by jabl 2y ago
As a slight aside, if anyone is interested in the topic the 'standard' introductory text is apparently 'Principles of Yacht Design' by Larsson and Eliasson. In particular, including a chapter on stability calculations. Y
388.
by jabl 2y ago
> Also, it's possible some of these basic balancing and center-of-gravity considerations were already known over 500 years ago To nitpick, properly being able to do these kinds of stability calculations are a considerably newer inve
389.
by jabl 2y ago
Presumably the thinking was that with all the sails down, there was no need to have the keel lowered. Which it probably wasn't, until the boat suddenly gets hit hard by an unexpected gust from the side and the windage of the rig is suf
390.
by jabl 2y ago
> Exhaust back pressure is not an issue at all on diesels because they all run big turbos. Not sure what you're arguing here. Isn't it quite obvious that resistance in the exhaust system means that the engine has to do more wor

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