barbegal

51 ms·

541.
by barbegal 8y ago
Adding a tinfoil hat would make you reflect more which the system would pick up even easier.
542.
by barbegal 8y ago
They are quite different. Wisee uses a single reciever and uses doppler shift to identify the gestures whereas this "through wall" system uses an array of transmitters and receivers that identify reflections from a position in spa
543.
by barbegal 8y ago
What this video (or even the paper) doesn't show is the large antenna arrays that are used to capture the heatmaps. A previous paper called "Capturing the human figure through a wall" [1] shows the type of antenna array used
544.
by barbegal 8y ago
The resistor in the USB-C cable to identify its current carrying capacity is still a passive component. And of course you can omit this resistor but your device will fall back to the minimum current.
545.
by barbegal 8y ago
That's just the difference between different lithium cathode technologies. ACM uses ~3% Cobalt and NCM 111 uses ~8% [1] [1] https://www.cell.com/joule/pdf/S2542-4351(17)30044-2.pdf Table 1
546.
by barbegal 8y ago
If you want to know the current (or at least 2016) state of actually running an algorithm on a real quantum computer then this video is great https://vimeo.com/180284417 It's about using a quantum computer to perform s
547.
by barbegal 8y ago
As a cynic I would say this is an attempt by Google and Cloudflare to collect DNS data. Why else would they provide this service for free? Both Google's [1] and Cloudflare's [2] DNS privacy policy prohibits them from storing perso
548.
by barbegal 8y ago
The investment today is only $0.9 billion with a further $1.35 billion at an unknown time in the future. This makes a present valuation of only $4.5 billion. And GM must commit $1.1 billion now. So GM will have invested a total of $2.1 bill
549.
by barbegal 8y ago
This is really a timing side channel attack. Such side channel attacks have been known about for a long time but this one allowed you to leak information about the color of a single pixel in your target page. I wouldn't say this is due
550.
by barbegal 8y ago
The assumption the author has made is that each chip has an R&D spend proportional to the revenue that it generates (~20%). This is clearly false. Some chips are relatively simple but sell in huge numbers so the R&D per revenue is e
551.
by barbegal 8y ago
Or should you just save more than the average person and hope that when you reach retirement higher taxes or deflation helps you out.
552.
by barbegal 8y ago
GM's Super Cruise uses an infrared camera so it can effectively see through most sunglasses. Some glasses do block infrared light too so the Super Cruise system doesn't work in all cases [1]. [1] https://eu.detroitnews.
553.
by barbegal 8y ago
Except in all the cases highlighted here, the boat was moored up in a port where the local jurisdiction would apply.
554.
by barbegal 8y ago
It's definitely not a solved problem in the real world. Eye tracking in the lab works great but in the real world there are lots of challenges. Low light levels at night, drivers wearing sunglasses, drivers squinting etc.
555.
by barbegal 8y ago
Under normal free market assumptions, the cost of double spending is simply the expected reward of each block multiplied by the number of blocks that need to be mined. For bitcoin, where the reward for finding a block is currently ~$100,000
556.
by barbegal 8y ago
Promises in javascript have become quite popular. Unfortunately, they're not understood very well so they aren't being used much in areas where they can improve the performance of javascript applications and instead are being used
557.
by barbegal 8y ago
Most manufacturers do in broad terms disclose how the boot sequence works. Here is an example of the information disclosed about a Cypress microcontroller [1]. In some applications the startup time can be critical so this needs to be known.
558.
by barbegal 8y ago
In embedded applications a lot of things happen before you can even attach a debugger. Most microcontrollers go through a non programmable hardware initialisation sequence which initialises enough hardware for the processor to run. The proc
559.
by barbegal 8y ago
Some bonds don't but you are correct these bonds do. However it isn't guaranteed that coupons will be paid on time especially if a company is in financial difficulty.
560.
by barbegal 8y ago
Not really. In a conventional business revenue tells you how big it is so should be reported in absolute terms. And traditionally, dividends matter to the shareholders and that is directly related to earnings per share. Profits may increase
561.
by barbegal 8y ago
Ask your broker. I would guess one so that would be $89 at the current price
562.
by barbegal 8y ago
Yes Tesla's latest unsecured bonds have a coupon rate of 5.3% which they pay biannually. So for a bond with a face value of $1 they will pay you ~2.6 cents every 6 months.
563.
by barbegal 8y ago
For 89 cents you can buy a Tesla bond with a face value of $1 which accrues at a rate of 5.3% per annum (so would have a face value of 105.3 cents after one year). Tesla will hopefully pay back the face value but they may not if they go ban
564.
by barbegal 8y ago
It's interesting that different cultures use names in different ways. I always hate it when websites give me a form to fill in where you must specify first name, middle name and surname. In a lot of the world this just doesn't mak
565.
by barbegal 8y ago
Mapping registers into bit field packed structures is actually okay because most ARM Cortex M processors have bit banding enabled on all the peripherals. Unfortunately not all peripheral libraries use that functionality and GCC doesn't
566.
by barbegal 8y ago
I'm not sure this guy really knows what he is talking about. Bit fields are almost universally hated and not allowed in style guides. The Arm guide he links to states: > Please note that peripheral locations should not be accessed
567.
by barbegal 8y ago
It would be tough because you would need a lot of transistors, at least a few thousand even for the simplest of RFID tags. In this study they only managed to print about 200. Given that you can buy RFID stickers for ~0.1 USD the economics d
568.
by barbegal 9y ago
NASA used to run an experiment with students counting stars [1] in various sites. The most that was counted was around 5000 which tallys up to the theory. [1] https://web.archive.org/web/20140610015945/http:/&
569.
by barbegal 9y ago
No you genuinely can't see more than ~4500 stars. I think we imagine that we can see more stars because we see a lot of photos taken using long exposures that can pick out more stars [1]. A 30 second exposure can bring out several time
570.
by barbegal 9y ago
You should probably disclose that you work for Postman.

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