barbegal

48 ms·

451.
by barbegal 7y ago
It is tuneable and at low bandwidth it can have a range of several hundred metres, maybe 100m indoors. The location element uses time of flight which is less effected by walls than signal strength methods so should be accurate to within a m
452.
by barbegal 7y ago
I'm skeptical about the cheaper per KWh. A 100W conventional turbine can be purchased for around $200 and has 3 blades around 50 cm in length. The 100W vortex device is 2.7m tall and I doubt can be purchased for less than $600 since th
453.
by barbegal 7y ago
I can't see how this design improves over a traditional three bladed turbine. Kinetic energy is still extracted from a large moving structural element and the forces involved will be much larger to generate the same amount of energy. T
454.
by barbegal 7y ago
It's trivial to know that it has more than one possible solution since less than 8 of the possible numbers are on the initial board meaning any valid solution that is found has a mirrored solution with all of one number swapped for all
455.
by barbegal 7y ago
You can have actual gears like on an ordinary bike so you can ride it normally without the electric motor operating
456.
by barbegal 7y ago
Bad title for an interesting article. Most of the world lives rent free for the same reason: they own it.
457.
ARM memo tells staff to stop working with Huawei(bbc.co.uk)
1 points by barbegal 7y ago|0 comments
458.
by barbegal 8y ago
I tried to find studies for the effects of teeth brushing frequency but the only ones I could find were cohort analyses as opposed to randomised trials. It seems like despite a lack of evidence, it would be very hard to ethically approve a
459.
by barbegal 8y ago
And once again the only people making money is the lawyers. There was no need for the Cloudflare lawyers to produce 900 pages of briefs. A few pages and a couple of hours in court would have been enough to persuade any judge that the claim
460.
by barbegal 8y ago
Economies of scale are largely negated by transmission losses. Both in getting the electricity to the charging point and in conversion to/from chemical energy in the battery. EVs cab be more efficient due to regeneration though. Power
461.
by barbegal 8y ago
This is a confusing article. The main content is a description of how to implement a simple operating system scheduler which effectively is implementing locks using instruction level primitives. The author has completely neglected the most
462.
by barbegal 8y ago
This font is also known as Staccato 555. It was ripped off by Bitstream and included in the Bitstream TrueType Font Pack for Microsoft Windows 3.1 For some information about these fonts see https://groups.google.com/forum&#x
463.
by barbegal 8y ago
The log suggests the device is doing everything correctly. The exploit webpage requires huge amounts of memory to render correctly. It is consuming all the available memory causing allocations for backboardd to fail. The kernel then starts
464.
by barbegal 8y ago
I would love to see an actual low power, long range system: a cross between Bluetooth low energy and LTE. Allow devices to transmit at a higher power than Bluetooth and with much smaller receiver on time than LTE.
465.
by barbegal 8y ago
It wouldn't be as good as Aerogel [1] which is a similar silica nano-particle based structure. It contains air as opposed to water so conducts very little heat. [1] http://www.aerogel.org/?p=1929
466.
by barbegal 8y ago
My understanding is that to produce dry water all you need is a fine enough super-hydrophobic substance. It doesn't have to be silica but we know how to produce hydrophobic silica nano-particles. The main property it has over tradition
467.
by barbegal 8y ago
Mainly because insects are expensive. Sure, they need less food than conventional livestock but they are very labour-intensive. You typically need thousands of insects to get the same amount of protein as a chicken. You can raise several ch
468.
by barbegal 8y ago
The glass is still going to be under the act of gravity and will form convection loops but in a different direction to the loops if drawn horizontally.
469.
by barbegal 8y ago
The $1 million per km figure is of course complete rubbish. That's just the cost scientists have had to pay to fabricate it using the zero-g plane. There is no commercial application where the demand is that high. The best commercial a
470.
by barbegal 8y ago
Box.com made a huge loss in 2017 https://www.boxinvestorrelations.com/news-and-media/news/pre... Dropbox made a huge loss in 2017 https://markets.businessinsider.com/news/stocks/dropbox-i
471.
by barbegal 8y ago
I'm sure this works well in bright light but I'm sceptical that this can perform at all well on overcast days or at night. The OS-1 device spins at 10Hz and the LIDAR samples 2048 points over one 360 degree revolution. This means
472.
by barbegal 8y ago
I think it should be allowed but the tests it should pass must be far more strenuous than for traditional software. I'm happy with failure rates of around 1 catastrophic failure every million hours. Even humans sometimes fail catastrop
473.
by barbegal 8y ago
The animation is somewhat misleading. Each of the three loops has a constant length. In the animation it looks like one loop gets longer whilst another gets shorter but that is not the case.
474.
by barbegal 8y ago
I feel like these tools very much go against the Unix philosophy of "Write programs that do one thing and do it well". They try to do the pretty user interface and the underlying operation in a single tool. I prefer PowerShell in
475.
by barbegal 8y ago
The problem is that most micro-controller ADCs use sample and hold with a capacitor so they require some time to stabilise. From the source code of other projects this seems to be on the order of 1 to 5ms which effectively turns it into a l
476.
by barbegal 8y ago
The OP is using "earned" in the colloquial sense to refer to revenue. Earning before interest and tax (EBIT) were a loss of $35 million in 2016 and a loss of $21 million in 2017
477.
by barbegal 8y ago
Most of the staff got a pay increase. A minority were given a pay cut[1]. The Hacker News discussion was based on an incorrect reading of the data posted. [1] http://disq.us/p/13b30h1
478.
by barbegal 8y ago
How do you implement the 1kHz filter? A 1kHz square wave is easily generated in software but surely you have to implement the filter using an op-amp and some passives?
479.
by barbegal 8y ago
Fireflies: https://hackaday.com/2009/06/25/64-synchronizing-fireflies/
480.
by barbegal 8y ago
I agree with you there, to win the case there would have to be some economic reason for Slack to not want users to use this extension. The reason they state is "Injecting javascript into Slack via Chrome extension can have an impact on

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