lcr

Well, that was not really my point about height, I was just drawing attention at how ridiculous it would be to see, for example, a sedan (about 1.4 meters tall) connected to an overhead wire that is any where from 2.5 to 3 meters (about the height you would need to be able to pass a swap body) in the air.

Like I said, it is technologically possible, but for most intents and purposes seems like a wonky solution, at least for personal vehicles, mass transportation and freight are completely different scenarios.

As for the other points, you are right, there are fairly straight forward solutions.

Inductive charging is definitely a good option, which has already been explored by transport companies[1]. It again seems to be that politics and money are the main barrier for implementation.

[1]http://primove.bombardier.com/products/charging.html

There is no technical reason why it can't be done[1], it isn't without its challenges though; How would you deal with the fact that roads are used by vehicles with wildly different heights? What about underpasses, is there enough space to fit the overhead wires? You would also need to make sure that vehicles in one place can connect to the grid on other places. It seems like overhead wires will probably be the best solution, but will only be implemented on highways for use on freight vehicles, not on cities or for personal vehicles.

Ground level power supply systems also exist[2], but would require you to tear up the entire road network in order to implement them, are expensive, and apparently prone to water clogging (which could perhaps be mitigated) without mentioning the fact that they would probably require either an autonomous or guided vehicle in order to reliably maintain contact with the rail.

So, not really, the limitations are mostly about cost and political capital.

[1]https://www.siemens.com/global/en/home/products/mobility/roa...

[2]http://www.alstom.com/products-services/product-catalogue/ra...

If you were to assume the soil you are excavating is very forgiving and your street is wide enough, you might be able to dig a trench that is 10 meters wide and 30 meters deep (you cannot dig straight down or the walls might cave in, unless you plan on using shotcrete, which you may or may not have to remove when you start backfilling the area). Now, we are talking about removing 975 cubic meters per meter of trench, if your street is 100 meters long, that is 97500 cubic meters you will need to excavate, at a rate of 33.1 cubic meters per hour, you would need to work around the clock for more than 122 days in order to excavate the trench.

You also have to take into account that you will need a place to store the 97500 cubic meters of soil you just excavated, which now have swollen up to 126800 cubic meters, the average dump truck can hold around 10 cubic meters, it would take you more than 10000 trips to move the soil.

This is just one street, never mind the fact that in order for this to be useful you will need to have at least a few kilometers of tunnel at a time.

Also, even if there are no internal combustion engines running in the tunnel, you still need ventilation shafts, subterranean metros have them for a myriad of reasons, even though there are no dinosaur squeezings being burned in the tunnels, for example, what happens if one of those very powerful batteries that run your Tesla happen to catch fire? People might suffocate if you can't force air into the tunnel.

Its a nice idea, but there is a reason why tunnel boring machines and vertical shaft sinking machines are so widely used on built-up areas.

Looking at the top end of Intel's SSD lineup I see that they have a product that advertises up to 175k IOPS of random 4K writes. Is this what you are referring?

The product is the 2TB P3700.

Have you checked out this list? :

https://github.com/bx/machO-tools

He might be referencing systemd's site [1]:

>But then again, if all that appears too simple to you, call it (but never spell it!) System Five Hundred since D is the roman numeral for 500 (this also clarifies the relation to System V, right?)

[1] http://www.freedesktop.org/wiki/Software/systemd/

It depends, technically a compiler output should be deterministic, but apparently there are a few that aren't, one example is any compiler built on Roslyn[1].

Although I think he might have been pointing out the problem of reproducible builds[2].

[1] https://github.com/dotnet/roslyn/issues/372

[2] https://wiki.debian.org/ReproducibleBuilds/About

From the SpiNNaker project page:

>The control interface is two 100Mbps Ethernet connections, one for the Board Management Processor and the second for the SpiNNaker array. There are options to use the six on-board 3.1Gbps high-speed serial interfaces (using SATA cables, but not necessarily the SATA protocol) for I/O...

Mexico - We have three several different levels of police, like many other countries. Federal, state, municipal, transit and ministerial among others (there are certainly more but this are the ones that you encounter for the most part.). The general view varies wildly between each different level.

Federal police: They are generally considered to be highly educated individuals so they have a certain amount of respect among civilians, most people feel comfortable around them and will trust them in case of an emergency.

State police: They are kind of iffy, particularly in my state you generally don't get to see ordinary state officers patrolling the city, but the state police has a famed SWAT team that is staked out at the state border 24/7 and will sometimes be seen patrolling around the city at night. Even though it has been a couple of years, they still have this terrible reputation that where ever they go something (not nice) is probably going to go down. A few years back they were always early whenever large shootout broke out, so now people are wary of them.

Municipal police: They are generally viewed as lazy uneducated people, and have a certain fame of being rude, corrupt (although, they aren't particularly corrupt), and unhelpful which is certainly warranted. Most people don't feel comfortable calling them.

Transit police: They are known for preying on the most vulnerable in an attempt to make some quick bucks, some are quite cheeky, most are rather subtle.

Ministerial police: They have a reputation of rampant corruption, and depending on where you lie on the socio-economic ladder, you are either not scared at all of them or you are absolutely terrified about having to deal with them.

YMMV.