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Comment Re:UTF-8 style would have been better (Score 1) 125

I can see a justification for fixed size packets though. Still, nice to have the flexibility. My other thought is that you should have a gateway with a short address and anything that uses it a longer address. E.g. find some way to have 123.45 as your gateway, and 123.45.1 through 123.45.256 as machines on the subnet. Maybe just zero terminate the addresses.

I thought it might have been possible to do some sort of nested packet idea. Something like 0-7FFFFFFF are global addresses, 80000000-FFFFFFFF are local subnets allocated as the administrator sees fit. So either each can be an individual machine, or there could be a second, third or greater level of subnet. Each level only need to understand how the level below it works.

You encapsulate a local subnet packet as part o the packet. Top level then sends that to the right place. No idea how the "from" address would work though.

Comment Re:What sort of morons work in the patent office? (Score 1) 202

No. But I am capable of reading

https://www.law.cornell.edu/uscode/text/35/282

A patent shall be presumed valid. Each claim of a patent (whether in independent, dependent, or multiple dependent form) shall be presumed valid independently of the validity of other claims; dependent or multiple dependent claims shall be presumed valid even though dependent upon an invalid claim.

Comment Re:What sort of morons work in the patent office? (Score 1) 202

The claims narrow the scope. Claim 1 is "A retail paper bag, comprising: a bag container formed of white paper with at least 60% post-consumer content".

Claim 4 is the narrower claim of "A retail paper bag, comprising: a bag container formed of white paper with at least 60% post-consumer content comprising a reinforcement insert adhered to an interior of the bag container"

Claim 5 is the even narrower claim of "A retail paper bag, comprising: a bag container formed of white paper with at least 60% post-consumer content comprising a reinforcement insert adhered to an interior of the bag container, wherein the reinforcement insert is adhered across a fold of the bag container"

So while the broad claim may not be valid, a dependant claim of narrower scope may well be. This is not about whether a product infringes. In this case, a product can't infringe claim 5 without also infringing claims 4 and 1. But if claims 1 and 4 are shown to be invalid due to obviousness, 5 is not.

Comment Re:What happens when the train craches? (Score 1) 199

Why would they add an oxygen tank? There's oxygen in the air!

A hydrogen fuel tank exploding will be quite a fireball, for sure, but hydrogen tanks are pretty tough. And even if they do explode, there's only so much energy stored. Not enough to affect anything that hasn't already been affected by a train barelling into it.

Comment Re:Hydrogen is a stupid fuel to use (Score 1) 199

It does strike me as inconvenient. Per MJ, methane at 250 bar takes up as much space as hydrogen at 700 bar, and many other hydrocarbons are liquid at room temperature. Plus natural gas already has a distribution network installed. Plus it already exists as a chemical in nature; so that's zero reactions.

I guess the inherent efficiency of hydrogen fuel cells makes up for all the other costs. Fuel cells do have excellent efficiency.

Comment Re:It's missing the full picture (Score 1) 199

Very little commercial hydrogen comes from water. It's cheaper to get it from natural gas. Problem remains (You'll be better off using the methane to power a power station), but I think it's important to be aware of this if we're discussing the relative benefits. .

These trains are designed for low volume routes where catenary would be expensive. Still, I'd have thought there are more convenient fuel sources. Hydrogen has excellent energy density by mass, but it's terrible by volume. Presumably hydrogen is just best for fuel cells.

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