dvdkhlng

6 ms·

1.
by dvdkhlng 3y ago
I already have problems following Proposition 1 where they introduce a different DNF with twice the clauses of the original CNF than claim that maximizing the satisfied clauses in the DNF would also yield a maximum satisfied solution for th
2.
by dvdkhlng 4y ago
Last time I read about that, the problem seemed to be buckling [1]. E.g. if you look at Euler's critical load [2] then the pressure that a slender column can withstand just depends on the aspect ratio of the column (imagine a vacuum a
3.
by dvdkhlng 4y ago
I'd think that the distance limit for _terrestrial_ mobile networks comes from the guard interval of the OFDM modulation [1]. I.e. on longer distances the time-offset between different different reception paths (due to reflections) of
4.
by dvdkhlng 4y ago
Yes, I can see the cabinet from my window, so maybe less than 100 meters cable. Inside big cities that seems to be the state-of-the-art. They must have placed a lot of cabinets in recent years. I'm surprised those cabinets don'
5.
by dvdkhlng 4y ago
Right now the modem reports a (link layer) data rate of 98338000 bit/s. Wget tops out at 10.7 MB/s.
6.
by dvdkhlng 4y ago
I'm currently on profile 17a, I pay for 100 Mbit (downstream), and get like 90 Mbit actual IP protocol bandwidth (wget tops out at 10.7 MB/s). But I think the ATM signalling that's still used on the underlying VDSL physical
7.
by dvdkhlng 4y ago
> You can't get these speeds with even VDSL.. That's not quite true. At least in germany, VDSL2 with "supervectoring" profile 35b [1] is routinely used, advertised as 250 Mbit internet service [2]. Technologically it
8.
by dvdkhlng 4y ago
> Interestingly, videos don't seem to count? It must be a written description? Wondering the same myself. Googeling for this issue turns up this power-point [1] which seems to imply on page 6 that "electronic publications, on-
9.
by dvdkhlng 4y ago
But you need to be aware of the downsides of becoming inadvertently over-reliant on GPS [1] [1] https://en.wikipedia.org/wiki/Death_by_GPS
10.
by dvdkhlng 4y ago
> Why not just use Evil, the VIM emulation layer. To cite Xah [1]: "xah-fly-keys.el is a modal editing mode for emacs, like vi, but the design of key/command choice is based on command frequency statistics and ease-of-key score
11.
by dvdkhlng 4y ago
> Long love ergomacs! I recently stumbled over, and started using (and modifying) Xah's "xah-fly-keys" emacs bindings, which are a somewhat more radical implementation of the ideas behind ergoemacs (e.g. use Emacs without
12.
by dvdkhlng 4y ago
My not very well-informed take on the situation is: Yes, Emacs seems to make a lot of progress in many directions. Latest git master does have elisp native compilation support (via libgccjit). Various elisp semantics have been modernized
13.
by dvdkhlng 5y ago
> Also, the fact that it's not rewritable means that... > 1. Security bugs[2] will never be fixed[3], rendering the hardware unsafe to use over time. But on the other hand: security bugs will never be introduced post-manufacturin
14.
by dvdkhlng 5y ago
I think this is called "green hydrogen" [1] which has application as an energy storage medium, but also more. Energy storage also does not imply, that that hydrogen needs to be turned back into grid electricity, but could be used
15.
by dvdkhlng 5y ago
I think the Linux desktop (at least when running under an xserver) does have an obscure keyboard-mouse function, see e.g. here [1]. This seems to be enabled by default when running the german-centric 'neo' keyboard layout ('s
16.
by dvdkhlng 5y ago
What about: DjVu [1]? It's not very well known, but it's so elegant, and also efficient, especially for scanned files. [1] https://en.wikipedia.org/wiki/DjVu
17.
by dvdkhlng 5y ago
I don't know anything about the details here, but with usual linear algebra stuff, bandwidth depends on the size of the kernel that fits into the local memory inside whatever IC you use for your floating-point computation. E.g. matrix
18.
by dvdkhlng 5y ago
Whether liquid or not, running the formula for kinetic energy of the counterweight, I'm getting something around 1 GJ (gigajoule) for a weight of 1 ton at 1500 m/s [1]. According to this site [2] that's equivalent to around 2
19.
by dvdkhlng 5y ago
Scott Manley talked on youtube about the centrifugal force on the wheel being around 10 thousand g (in the full sized version). So how do you build something that touches a tunnel at hypersonic velocity with many thousand tons of force wit
20.
by dvdkhlng 5y ago
Yes, that's an intriguing idea. What I came up with was this: the launch arm has a second mass inside it, that will move (via centrifugal force) away from the center, in the same moment the payload is released. Of course, just having t
21.
by dvdkhlng 5y ago
You are right, it does not say anything about the Permanent Court of Arbitration's decision on the matter. I was more trying to make the point, that various court decisions related to this matter (the original decision against chevron
22.
by dvdkhlng 5y ago
Interestingly, the United Nations Human Rights Office's has quite the opposite opinion regarding the Evron vs. Donziger case (the one in the US that lead to Donziger's house arrest) [1]. "The Working Group recalls that it is
23.
by dvdkhlng 5y ago
Talking about international bodies, we should also consider the opinion of the United Nations Working Group on Arbitrary Dention, which is that "Noting all the above, the Working Group concludes that the detention of Mr. Donziger lac
24.
by dvdkhlng 5y ago
The wikipedia page on Donziger [1] says that the main witness to those bribe accusations retracted his statement and gives [2] as a source for that retraction. It seems, that the US courts did not consider that retraction, though [1]. [1]
25.
by dvdkhlng 5y ago
My take on it: you get "infinitely parallel" computation, generating "inifinetly parallel" results that are in superposition. Problem is, at the end you can only access your "infinitely parallel" result via a
26.
by dvdkhlng 5y ago
In case anyone wonders, I think the same argument is made in a somewhat easier to understand way in one section of the the P vs NP wikipedia page [2]. But I think that would turn (b) into a special case of (a) i.e. a bizarre algorithm that
27.
by dvdkhlng 5y ago
The difference is that coal contains carbon that has been locked inside the earth's surface for at least a few million years (if not longer). Trees on the other hand contain carbon that those trees extracted from atmospheric CO2 while
28.
by dvdkhlng 5y ago
Can second the praise for the Epson Eco-Tank printers. Ink is cheap and lasts extremely long. Also I never had any problem with clogged nozzles etc which I used to face frequently on the cheaper printers. (though my Eco-Tank printer is b
29.
by dvdkhlng 5y ago
Where I come from, big city etc. there seems to be not much time advantage of taking a car vs. taking a bike. After all a bike is very easy to park close to your destination and it's not affected as much by traffic jam (due to rudime
30.
by dvdkhlng 5y ago
Well, the Cell CPU also had DMA engines that were fully integrated into the MMU memory-mapping, so you would have been able to asynchronously do a memcpy() while the CPU's execution resources were busy running computations in parallel.

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