jarvist

11 ms·

61.
by jarvist 8y ago
Contemporary accounts suggest that it was an almost intentional ignorance. People were addicted to the idea that heavy-bombers were strategically useful in Europe (when they just flattened civilian parts of cities, all the manufacturing was
62.
by jarvist 8y ago
Those are cooling towers (steam -> water), and there is no indication whether that is a power station or industrial plant.
63.
by jarvist 8y ago
It is believed that this is already happening: "The regular use of Caesarean sections is having an impact on human evolution" https://www.bbc.co.uk/news/science-environment-38210837
64.
by jarvist 8y ago
My understanding is that the majority of Methane molecules end up as CO2 anyway (Methane -> CH3 radical -> Formaldehyde -> CO2): https://en.wikipedia.org/wiki/Atmospheric_methane#Removal_pr... So the underlyin
65.
by jarvist 8y ago
There's usually plenty of air underground in a cave. They are actively being weathered / formed by little streams, which drag down air with them, forming a natural circulating draft. So even though the human-sized exit is flooded,
66.
by jarvist 8y ago
It's a pretty harrowing story. http://www.bbc.com/future/story/20160118-the-tragic-fate-of-...
67.
by jarvist 8y ago
I guess these are the Strontium-90 RTGs made by the Soviets. There's about 1000 out there still - some have been vandalised, some washed out to sea, some sitting rusting in a lighthouse outhouse etc. http://bellona.org/
68.
by jarvist 8y ago
It's much easier physically to build something which can hold e.g. +0.1 atmosphere helium, than resist imploding against -1.0 atmosphere. Practically speaking, pumping down to vacuum is a slow process, whereas you can flush with an ine
69.
by jarvist 8y ago
You'd certainly expect the long-term failure for Helium filled to be lower. By displacing (moist) air, you've completely stopped any metal corrosion. Helium is also highly conductive to heat, so you will even out any hot spots. Do
70.
by jarvist 9y ago
A bespoke solution (learns by your 'up votes') for any area of the ArXiv has been developed by Anton Lukyanenko: http://arxivist.com/
71.
by jarvist 9y ago
Powertop echo's the shell command it is doing to effect the change. Most of it is just changing defaults in /proc. You can experiment yourself. For instance, I find that making the audio-codec go power-saving leads to pops and cr
72.
by jarvist 9y ago
It's worth running 'powertop' and seeing what it recommends. I've then put a set of suggested shell commands into a script which I run. On my X220, with WiFi and Chrome and medium brightness, consumption is about 10 W. T
73.
by jarvist 9y ago
I upgraded the TN panel on my i5 X220 to a matt IPS 18 months ago. It was about £50 from eBay; and a careful 5 minutes with a set of electronic screwdrivers. (All quite easy, you just have to be very very careful when removing the ribbon ca
74.
by jarvist 9y ago
A £200 EPIRB (10 yr battery life, waterproof, float) would be more sensible. However, if you are a poor coastal fisherman with no intention of going far offshore... ?
75.
by jarvist 9y ago
I think your perception is incorrect. It is now well recognised that London has the highest quality teaching in the country: https://www.theguardian.com/education/2012/jan/20/top-local-... https:/&
76.
by jarvist 9y ago
I find this online tool very quick & produces fairly good quality BibTeX. I think it mainly uses the Crossref API. http://www.doi2bib.org/#/doi
77.
by jarvist 9y ago
For this generation in the UK we were lucky in that the BBC Micro computers from the BBC Computer Literacy Project[1] were still physically in our primary school classrooms (early 90s). I have a very memorable young memory of programming LO
78.
by jarvist 10y ago
Gnuplot is still used quite a lot in my area. You need to work more to make something aesthetically pleasing, but it's generally a better fit to plotting large amounts of data coming from another code. I've also been quite badly b
79.
by jarvist 10y ago
Requires an explicit '-playlist' tag on recent (?) mplayers, otherwise it aborts due to potential security issues. alias dronezone='mplayer -playlist http://somafm.com/dronezone130.pls' alias gro
80.
by jarvist 10y ago
Yes, it's about 2/3 c (speed of light) in a fibre optic (refractive index n=1.44), and about 1/3 c in a copper cable. Air barely slows it down.
81.
by jarvist 10y ago
From your username & requirements, I'd definitely recommend looking at Julia: http://docs.julialang.org/en/release-0.4/manual/introduction... It can be very fast by itself, and can also be written e
82.
by jarvist 10y ago
I believe WEEE (Waste Electrical and Electronic Equipment) recycling plants use computer vision directly. Recycling plans having multiple optical units with compressed air to then redirect the route of identified items, but I don't kno
83.
by jarvist 11y ago
A recent alternative is to write the entire program in Julia. It is a lot less ugly than Numpy, and so performant that most code (other than steadfast libraries such as BLAS and LAPACK) are written in Julia itself. http://juliala
84.
by jarvist 11y ago
Or try a pocket mount: https://www.youtube.com/watch?v=2O9aLYSntTQ Techmoan has extremely detailed action camera reviews, with raw sample footage, and often takes them out for a ride (weather permitting, he's in the UK
85.
by jarvist 11y ago
The TTM books grew out of the Stanford Continuing Studies courses by Susskind. These were recorded by Stanford and uploaded to Youtube: http://theoreticalminimum.com/courses There is very much more content in these lecture
86.
by jarvist 11y ago
The guide explicitly says to use Earl Grey, which is a bergamot oil infused Assam. Both of these loose-leafed teas, as well as typical British loose-leaf blends such as English Breakfast, are brewed at 100 C, and taste awful (bitter and sli
87.
by jarvist 11y ago
I suspect 16 m^2 --> 215 sq ft. (GP mistakenly multiplied by feet-in-metres rather than square-feet-in-square-metres conversion factor.)
88.
by jarvist 11y ago
> using reactors designed to use the waste as fuel What do you mean? The waste is full of nuclear poisons (a technical term, isotopes that stop fission by neutron capture). Reusing it means reprocessing to extract the Plutonium, which is
89.
by jarvist 11y ago
The first practical high efficiency (6%) cell was made in Bell Laboratories in 1954. It was the first PN junction silicon solar cell, the technology that still powers 90% of solar cell modules on the market. http://www.aps.org&#x
90.
by jarvist 11y ago
Fission: Nuclear power stations have relatively low capacity factors (a measurement of how much of time they're actually connected to the grid and producing power). This is typically 70% over the last few decades for Western countries

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