zh3

16 ms·

181.
by zh3 3y ago
Comment from Andres Freund on how and why he found it [0] and more information on the LWN story about the backdoor. Recommend people read this to see how close we came (and think about what this is going to mean for the future). [0] https:
182.
Sound Mirrors – The concrete blocks that once protected Britain(bbc.co.uk)
2 points by zh3 3y ago|0 comments
183.
by zh3 3y ago
Suspect you're getting downvoted because of the last sentence. However, I do sympathise with MacOS tending to mangle standard (even plain ASCII) text in a way that adds to the workload for users of other OS's.
184.
by zh3 3y ago
There's also Poincare and the Bakery [0], which is quite possibly apocryphal but often told - esentially a departure from the normal disibution showing something odd going on. I vaguely recall reading that the technique was used in the
185.
by zh3 3y ago
IAM is hideous; users, organisations and policies are a barouque mess, where you're expected to hand-edit JSON files specifying resources then debug the cryptic error messages thrown when their own examples are pasted in. Plus the docu
186.
UK scientists say more Redwoods in UK than in California(bbc.co.uk)
2 points by zh3 3y ago|0 comments
187.
by zh3 3y ago
As a user of stripped-down XFCE and being a Wayland virgin, interested to know what problems there are with 'no-bloat' WMs on Wayland?
188.
by zh3 3y ago
Look up diskless booting, it's a very general thing on linux (i.e. not Pi-specific, although there are plenty of Pi-specific tutorials on the 'net. As a minimal first step, install an NFS server (which can be X86, Pi, other) on yo
189.
by zh3 3y ago
As someone using many, many Pi's at home and many times that at work, the preferred approach is to boot them all diskless (and for those that actually need an SD card, boot them off a read-only SD card and get everything else off the h
190.
by zh3 3y ago
No mention of frozen garden hose in the title should have given it away.
191.
by zh3 3y ago
Agreed, Keirin (in my limited knowledge) aims to keep things pure in their particular area (making competition a level playing field). By comparison, the UCI wants to have control over a much wider part of cycling (and so want to rule over
192.
by zh3 3y ago
+1 for Obree - more people should know the history. For those into cycling who don't already know them, the Obree book [0] and film [1] are worth the time. [0] https://www.goodreads.com/book/show/231993.Flying
193.
by zh3 3y ago
It's a great time for experimentation (outside the UCI straitjacket) to see what works; there's scope for lone inventors (harking back to Obree) to figure out what works, perhaps not so equally there are people designing stuff on
194.
by zh3 3y ago
Dan's name does indeed come up a lot in our circles :) Thanks for the links, even being in the biz there's always more to learn.
195.
by zh3 3y ago
Agreed, and that's why the "naive" is in my comment :) An even faster is to drop the packerisation and run the transmitter continuously with an appropriate code (self-clocking); the digital radio delay then drops to microseco
196.
by zh3 3y ago
It worked that like for many, many years (radio mics) before digital came along. Think of FM radio - if you have a good signal, it's pretty resilient to interference and in a controlled short range environment it is extremely reliable.
197.
by zh3 3y ago
To a large extent, yes. Head position (varies with helmet), back curve, hand and arm positions etc. We measure the number of watts saved by various combinations of rider position/rider equipment (helmets/skinsuits etc) in real tim
198.
by zh3 3y ago
Quite a lot of the design inspiration comes from top riders and their coaches - the level of technical knowledge they have is astonishing. We work with bikes like these, covering them with sensors and loadcells (we've had something lik
199.
by zh3 3y ago
A/D conversion itself wouldn't add much at the sample level (say 48KHz sample, it's about 50us per sample). However, packetisation will - a 256 byte packet of 128 samples is 128*50us = 6.4ms right there at the transmitter, an
200.
by zh3 3y ago
That is great stuff, many thanks for it. While not in such depth, for a precision timing network covering multiple sensors our analysis also showed that the delays and variation inherent in most higher-level radio protocols are far too high
201.
by zh3 3y ago
You can watch it live on the BBC. https://www.bbc.co.uk/news/live/world-europe-68237950
202.
Hinkley C nuclear plant costs could soar to £46B(bbc.co.uk)
6 points by zh3 3y ago|2 comments
203.
by zh3 3y ago
Perhaps you meant the "Caspian Sea Monster" [0] or similiar Ekranoplans? [1] [0] https://en.wikipedia.org/wiki/Caspian_Sea_Monster [1] https://en.wikipedia.org/wiki/Ground-effect_vehicle
204.
Unseen images of code breaking computer that helped win WW2(bbc.co.uk)
9 points by zh3 3y ago|0 comments
205.
by zh3 3y ago
My point was that at the RF level, BT packets get swamped by Wifi (hence only getting through in the gaps). With Wifi putting out 100mw and BT around 1mw, added to WiFi devices generally having much larger antenna, WiFi is the thing to work
206.
by zh3 3y ago
One factor is Bluetooth is on the 2.4GHz band, and WiFi on that band is many times more powerful - so Bluetooth packets can only get through in the gaps between Wifi transmissions. Many of the Bluetooth devices around use Nordic Semi nrf5x
207.
by zh3 3y ago
Indeed, Trafigura [0] [1] are a shining example of how to do business (they dodged prosecution in Norway [2] for the same kind of waste they dumped in Africa). [0] https://en.wikipedia.org/wiki/2006_Ivory_Coast_toxic_wa
208.
by zh3 3y ago
Famously, the 'swiss cheese' model [0, critical article] - every layer has holes, so layers of safety are required to reduce the chances of holes lining up (leading to a failure dropping though - and resulting in an accident). [0]
209.
by zh3 3y ago
What is clear about this is that the system couldn't even balance the books (which has been obvious for years, to anyone in the UK following the story). If the computer says "You took £x thousand and only banked £Y thousand",
210.
by zh3 3y ago
strace solved an issue for me today - logging in to a different account on my debian PC using 'su -l guest' would hang for 30s before letting me in. Interestingly, 'strace su -l guest' failed with a permission error duri

More ›