Now, if someone could tell me how to use it within PHP...
My company created an open-source HTML-diffing PHP package[0] that could be considerably improved by replacing the old Tidy with the HTML5 Tidy (if I only knew how!)
I have a 22" external monitor hooked up to my 12" laptop and one of the main reasons for this is ergonomics - I put the monitor on a stand, so that the top edge of the screen is at the same height as my eyes, and the laptop's screen doesn't obscure the external monitor's screen.
The end result is that I have a tiny and lightweight laptop for travel and at the same time reasonably big screen for everyday work.
One of the best things about DigitalOcean is that they charge per hour, which means I can spin up several servers, test things out and then tear them down, incurring just a few cents of costs in total. OVH asks me to pay for 12 months up front.
Also, their support is awfully slow. I'm in the slow process of moving to another host/registrar.
Because it won't tell you if there's humidity inside the bag that could potentially harm your device.
Silica gel isn't electronics. It'll change color when it detects moisture.
How is that supposed to be secure? All I need to snoop on your conversations is access to your phone for 1 minute to receive the activation code and delete message about new device connected to the account.
I always thought 1 litre of water equals 1 kilogram. And as we know how long 1m is from nature, why don't they use 10cm x 10cm x 10cm of water at a specified temperature as a prototype of kilogram?
That was the original definition. Things change over the course of a couple of hundred years or so, though, and the imprecision of that definition was noticed early on.
Where does the imprecision come from exactly? Can't we derive the kilogram from the number of hydrogen and oxygen atoms in a litre of water at an uniform temperature?
But then your definition depends on the definition of temperature (energy/entropy) which in turn depends on the definition of mass. You might say "make all measurements at the triple point" but then you are still stuck with the problem of dealing with thermal fluctuations and structural variation (liquids have uniform structure only in a weak statistical sense) in addition to the practical problem of ensuring uniform composition at the triple point. This idea doesn't work for benchtop measurements (How do you determine that you have 1 mole of H2O? By measuring it's mass!) and it doesn't make sense for high-precision measurements where you need to provide a mechanism to allow the experimenter to make the error arbitrarily small.
One of the leading proposals for the 2014 redefinition is very similar in spirit, though: defining Avagadro's number to be an actual number rather than a derived quantity (effectively this uses Carbon 12 as the mass standard).
Another proposal is to define Planck's constant. I can't comment on the measurability of this one, but it would probably make people studying atomic physics happy because they like to use units that set most common constants to one, and the redefinition would make more of these implicit factors of 1 defined, rather than measured quantities.
Perhaps. But at least one complexity there is that there are a couple of isotopes (of different mass) for both oxygen and hydrogen.
There's the Vienna Standard Mean Ocean Water[1][2] which accounts for differing isotopic compositions in different parts of the world.
There's been some competing attempts to the Standard Kilogram, including a pure silicon sphere of extremely precise physical dimensions (which we're good at), and using the lattice spacing to determine the number of atoms.
I used to live next door to one of the guys working on the KG. Very smart guy! Basically from what I gather, weight is the last unstandardized unit of measurement at the moment and the problem derives from finding something that has constant mass. Apparently it's pretty near to being solved though, I believe their project was sold to Canada last year though.
My company created an open-source HTML-diffing PHP package[0] that could be considerably improved by replacing the old Tidy with the HTML5 Tidy (if I only knew how!)
[0] https://github.com/gathercontent/htmldiff