xioxox

16 ms·

181.
by xioxox 6y ago
Have a go with the Veusz package (I'm lead author). It does interactive 3D plots, has a GUI and Python interface. I think the 3D speed is reasonable (providing the BSP clipping isn't switched on). http://veusz.github.io
182.
by xioxox 6y ago
There is also Doom (2016) which (mostly) honours the simplicity of play found in Doom and Quake, but I found the mostly arena-style action rather dull and repetitive after a while. I missed the tunnels and so on in original games. Personall
183.
by xioxox 6y ago
The letter is from 1994. See Starlink Bulletin #13, pg : http://starlink.eao.hawaii.edu/starlink/Bulletins
184.
by xioxox 6y ago
The Psyco project (now dead) used to get very reasonable speedups (factors of several) in pure Python code, particularly for numeric algorithms. It was retired because PyPy was being developed and was expected to solve all speed problems. I
185.
by xioxox 6y ago
HiDPI is pretty good on a KDE desktop nowadays
186.
by xioxox 6y ago
Though a lot of these errors are in the package metadata, Debian doesn't make it easy for itself as the build system and packaging format is very complex. There are lots of different build system variants, relying on weird poorly-docum
187.
by xioxox 6y ago
RedReader is a good Reddit app for Android on F-Droid
188.
by xioxox 6y ago
There are also alternative much better apps (e.g. redreader from the F-Droid store for Android).
189.
Core War(en.wikipedia.org)
2 points by xioxox 6y ago|0 comments
190.
by xioxox 6y ago
I have a Toshiba Portege R500 in a cupboard somewhere. It was a very impressive machine. It's extremely light at less than a kg (particularly compared to others at the time). It has an SSD (albeit on some weird interface). The keyboard
191.
by xioxox 6y ago
x86 has much stronger guarantees about memory ordering compared to ARM [1]. Maybe this comes under x86 features, but multithreaded software will not work if assumptions of memory ordering guarantees are made. [1] https://en.wikip
192.
by xioxox 6y ago
3D is hard to do in real time as you have many more grid points. The method I linked to is much faster than properly solving the fluid equations, so is suitable for a 3D interactive simulation.
193.
by xioxox 6y ago
There's this paper which describes a simplified fluid dynamics appropriate for games: Real-Time Fluid Dynamics for Games by Jos Stam. You can find the paper and implementations by searching. It's based around numerical stability a
194.
by xioxox 6y ago
What? Where is this good string support in Fortran 2003, 2008 and 2018? I must have missed it in the manual. Now you can allocate a string of a non fixed size - simply amazing technology! Actually, one of my compiler crashes was trying to u
195.
by xioxox 6y ago
Although Fortran compilers may produce fast code (they have to - there's no chance to play with SIMD intrinsics or templates unless you want to use C++), I don't find them very good. I've personally hit several bugs in gfortr
196.
by xioxox 6y ago
There's quite a lot of citations to problems fixed by high precision numbers here: https://www.mdpi.com/2227-7390/3/2/337/htm
197.
by xioxox 6y ago
There are quite a lot of these. Here is one I like: https://automeris.io/WebPlotDigitizer/
198.
by xioxox 6y ago
That's a relief considering how bad DAB is. Most stations in the UK are stuck on DAB rather than DAB+, which means poor MP2 codec quality. Then they've gone for more identikit stations rather than higher bitrates. There's ver
199.
by xioxox 6y ago
I'm not sure why you're bringing up synchrotron radiation in particular. Although it's important for some sources, it's not driving the majority of what is being seen here. Comptonization is important for active black ho
200.
by xioxox 6y ago
I believe it's detecting more sources than expected. This can be to do with how efficient observations are (very good so far), how low the background is (higher than expected, but stable), the performance of the telescope in space, and
201.
by xioxox 6y ago
Here's a nice video showing how SRG/eROSITA scans the sky: https://www.youtube.com/watch?v=z8M-80aMDO0
202.
by xioxox 6y ago
XMM is still extremely useful. There was a recent report that using clever techniques ESA are going to keep it going for another 10 years: https://www.esa.int/Enabling_Support/Operations/Teaching_an_... XMM has a
203.
by xioxox 6y ago
Some of the structure can be seen in the old ROSAT maps from the 90s: http://www.xray.mpe.mpg.de/rosat/survey/sxrb/12/ass.html Recently XMM looked at the centre of the galaxy, finding chimney-like struct
204.
by xioxox 6y ago
The half energy width (angle over which half the energy is deposited) is around 16 arcsec on the axis of the telescopes (3600 arcsec=1 deg). Due to the Wolter geometry, it gets worse as you go off-axis. In the survey sources scan over the f
205.
by xioxox 6y ago
Lots! It has discovered about a million X-ray sources, about twice as many as previously known about. Most of these sources will be active galactic nuclei (supermassive black holes that are accreting material) in distant galaxies. There&#x2
206.
by xioxox 6y ago
I'm a scientist on the team who did this (I actually helped put this picture together), so I can try to answer questions...
207.
by xioxox 6y ago
The eROSITA telescope onboard the SRG observatory has completed its first survey of the sky in X-rays, producing the deepest ever map in X-rays and finding over a million sources. Most of these sources are active black holes, clusters of ga
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Our deepest view of the X-ray sky(mpe.mpg.de)
53 points by xioxox 6y ago|19 comments
209.
by xioxox 6y ago
The UK has had sitcoms on the radio since the 50s and TV since the 60s, when there weren't many channels. I think it's more down to what the controllers of the channels want to put on it. Sitcoms can be extremely popular - Only Fo
210.
by xioxox 6y ago
Just a question - why do you have a dependency hell? You could restrict yourself to the Python standard library, and you would only have one dependency. The Python standard library is much nicer than bash if you need more complex data struc

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