Yet you will find that mortage interests charged by the bank don't match your series, because they use an accrual schedule with a special way to measure years fractions, then calculate an equivalent notional for those dates, and remap that to your payment calendar.
Turns out there is a surprinsing amount of details here as well. And you don't have all parameters for the calculation, like often in life.
Eh? Typical min bend radius is like 10x diameter in static conditions, so for a 2mm fiber cable that'd be 20mm or ~0.8". That's not an issue at all with consumer usage, and if you're really worried is trivially solved by just building the thing up to the level of thickness Thunderbolt cables have already. That's why Corning for example advertised their old TB optical cables as "zero bend radius" [0], adding more polymer/armor around a fiber cable so that someone can do whatever with it and it naturally won't go out of spec isn't a big deal.
FWIW, anecdotally high performance copper doesn't like abnormal use either. 10g USB-C cables are cheap enough that I tried taking one and using a vice grip to actually really squash thing at an angle, and it didn't like that at all in terms of working reliably afterwards. I doubt DP, HDMI and the like would do better, and those are plenty thick too. It never comes up though in normal use. And when cables are cheap vs stupid pricey making a mistake no longer is such a big deal. If you use an $8 cable a bit too hard and it stops working, well grab another one out of the drawer. If your $70 cable breaks that's a touch worse.
Was in healthcare IT as well: https://www.fs.com/products/41028.html?attribute=35025&id=61... for a couple of dollars you can get 2 paths of crush protected bend insensitive high speed fiber that barely degrades signal quality when you knot it up. To get around the limitations of the LC connector and wall jacks being regularly obliterated by equipment/tables being moved around use recessed jacks, that way they just pass by instead of break the connector (applies to rj45 as well). We had great success with this approach for a couple thousand locations.
Of course, the real problem 95% of the time is really around the device not the technology the device uses. There is a misalignment of incentives on who can work on the device, whether standard parts are used, and whether the approved parts are the $2 type solution that will cost $800 in on site contractor fees to replace again or the $4 solution which actually stands a chance to being used. Once the device is bought nobody is going to be incented or allowed to do anything but fix it to status quo. It's one reason I had to get out of healthcare IT - it was more often the system getting in the way of what patients and nurses needed to do than the actual technology itself so solving things from a technology perspective felt like running on a treadmill and going nowhere.
In my experience they wouldn't even mind or be embarrassed, so long as said solution sounded like it would stay out of the way and let them use the device more conveniently. To them that's the whole point of IT: make it less painful to use the devices how they want to use them to do their job. IT isn't the savior that designs things they want, it's the cost center that makes the things they have to use less annoying to use.
Until someone figures out how to supply bus power over optical fiber, I don't see it as a viable alternative for typical consumer peripheral I/O applications, no matter how inexpensive and robust the cables are.
The most common use cases for the kind of long range high bandwidth connectivity that fiber is good for are networking and displays, neither of which typically carry power in consumer use cases. USB cannot be replaced by a purely optical connection, but Ethernet and DisplayPort certainly can, and tunneling USB alongside DisplayPort to split back out at the monitor doesn't present any power delivery challenges.
We have FTTH everywhere in India and seeing how fiber is installed in all kinds of nooks and crannies, I can tell you that fiber is more resilient than you think. And frankly, I have experienced far less Internet outages with FTTH than I used to with twisted copper pairs (ADSL2+).
G.657B standard cables have a pulling (stress) bend radius of 5mm. So, you can abuse it quite a bit and it's fine. Also, while it is abused during installation, at rest, it is not under so much stress and usually have a sturdy casing to make sure it stays above its min bend radius.
I don't know if this is a helpful comparison for you, but my FTTH cable is almost identical size and material-wise to Apple EarPods cable. Has been working fine for years now, though obviously I don't move the router that much.
It bends just fine. There's tons of fiber cables for "ordinary users" including HDMI, DisplayPort, Thunderbolt, VR link cables, and, of course, toslink. You just end up with the extra cost and complexity of having transceivers built into the cable which is a waste especially at these speeds where copper is clearly a limitation.
- long runs that are not that long. hdmi does not like long cables at all. even an overhead projector in a classroom requires super expensive cables (ever wondered why it's still mostly vga?)
- packing multiple displays in a single cable. fiber is so thin that with trunk cables you get a lot of strands in a single cable, capable of running a lot of displays
- just getting a really thin cable that can be run in existing conduits or hard to reach places
I did buy such a cable for home for the third reason, to run from the PC in the office to the TV in the living room. It runs on a bog standard OM3 MPO cable. The specific one I got comes from HeyOptics and their website already showcases a few usecases [1]. (not affiliated, just a great product that just works)
As for stadiums and more generally broadcast video, they're using SDI instead of HDMI. Those are indeed most of the time fiber, both for range and weight (think of the cameraman running along the terrain during a sport event, and their long tail of cables). When they use HDMI it's more in the control room.
8m or so is the limit for HDMI passive cables being 100% reliable.
If you want to go 15-30m--- using a video source from another part of your house, or to drive a projector in the middle of a classroom--- and you buy an "active cable", odds are it's fiber optic inside.
If you want to go hundreds of meters away, you'll get a purpose-built box that uses your own optical cables instead of a cable that hides the optical transceivers inside.
It's fairly thin, quite a bit thinner than most of my traditional copper cables I think. Apparently it's nominally 15m, they also have a 20m one: https://www.monoprice.com/product?p_id=43328
Copper thunderbolt cables are only good for 2-3m, after which you need active cables or repeaters and fiber is easily the best option at that point.
HDMI and DisplayPort are good for a bit longer than Thunderbolt over copper, but not by all that much. HDMI 2.1 can only go to around 3m as well now.
So we're in a world where "long" is a mere 5 meters / 15 feet. This is why so many VR headsets are using fiber cables - it has to be long to enable the movement and logistics of connecting a PC to someone freestanding in a room, but modern video signals are just too hard to drive over copper at that not really that long distances.
Once neuralink-like devices become ubiquitous, they will ask for a "kill switch" in people's brain.
And the same HN users on this thread will say that's not such a big deal. Law enforcers can already track people and arrest them physically, that's just a faster way to do that.
But no, it's bonkers.
And yes, a kill switch in cars is bonkers.
You want to stop a car? You should do that manually because:
- it requires efforts and has a high cost, for something that should not be common
- it implies skin in the game
- it's very hard to mass scale
- it's not nearly has much subject to hacking, corporate abuses, rogue cops, dirty politicians or bugs
- you can throttle things like speed and capabilities from the car, no need for a kill switch
The fact that some people here even debates that shows how much we are screwed.
A significant part of our population, even the educated and smart one as this thread demonstrates, cannot think in a way that will lead to maintain a decent amount freedom given a enough time.
You could never, you cannot, and you will never be able to assume benevolence and competence from the people in power. Their power must always be restricted, for us to keep being free on the long run.
It's not a matter of morality.
It's causality at work.
But sure, the biggest problem is that "it's a not violation of privacy".
And sure, it's just "for impaired drivers". Just like the patriot act was only temporary, right?
>The fact that some people here even debates that shows how much we are screwed.
It's really sad to see that even after centuries of countless examples about how the authorities of the time will end up abusing any power that's granted to them there's still people (even a majority of people) who think it'll be different this time as opposed to our whole known human history. We surely are doomed to repeat the same mistakes again and again and again.
> cannot think in a way that will lead to maintain a decent amount freedom given a enough time
I think it's because of the power imbalance between the state/corporation and the public. Those who seek to control have the resources, including an army of educated and smart people, to persistently push forward on their agenda, lobbying to shape laws, and mass media to shape the public opinion. They own the mainstream narrative, what is discussed and how.
We might fend off this particular attempt at further restricting our freedoms, but it's guaranteed they will try again and again, each time the gear of their infernal machine turns like a ratchet.
... and this is why it is disconcerting that anyone else has any amount of influence in your life under a democracy. Half of everyone has a below average IQ, and many of those on the other side of the curve are just awful.
Smart people are the ones who made nukes and all this tech. Definitely people worth being suspicious of for sure. Don’t kid yourself thinking that intelligence is some magical panacea that makes people moral.
I'd take malice over stupidity - because at least it can be anticipated. If you were being charged with a crime you didn't commit, would you prefer that half the jury believe in ghosts and flying saucers - or a smaller fraction just be plotting on you?
Over half of all neurotransmitters, including 80-95% of seratonin, originates in the gut. I wouldn't be surprised to hear a microbiome-based theory of personality but cellular memory is a new one to me
Possibly related: it turns out horizontal gene transfer is way more common in humans than we could expect and we really don't have a good explanation for how it's happening
Over half of all neurotransmitters originates in the gut, but the barrier preventing the entry of neurotransmitters into the brain is very effective in healthy individuals.
Signals from the gut to the brain arrive via the vagus nerve and probably also the other cranial nerves.
Interesting! The way I've often heard it is that "over half of neurotransmitters originate in the gut" — making it sound like it's talking about the neurotransmitters already at the brain. Do you have any citations that could clarify this?
Neurotransmitters are used all over the body. A lot is centralized in the brain, but the periphery also uses neurons and neurotransmitters.
Neurotransmitters in general don't particularly imply they're being used in the brain. Some neurotransmitters travel through the body, but a larger fraction are produced locally by a cell and intended only for close neighbors.
Python might say that, but as often it’s not really true: it really mostly works off of 2045
- the “default” encoder (“b64encode”) will pad the output
- although it will not linebreak (“encodebytes”) does that)
- the default decoder will error if the input is not padded
- the default decoder will ignore all non-encoding characters by default
Also both b64encode and encodebytes actually use binascii.b2a_base64, which claims conformance to RFC 3548, which attempts to unify 1421 and 2045. Except RFC 3548 requires rejecting non-encoding data, whereas (again) Python accepts an ignores it by default, in 2045 fashion.
Turns out there is a surprinsing amount of details here as well. And you don't have all parameters for the calculation, like often in life.