* Posts by rsjaffe

3 posts • joined 13 Dec 2017

Too many leftover screws? Ikea website backend goes TITSUP

rsjaffe

They're still decoding all the pictures in their disaster recovery plan, and checking that they have all the pieces they need.

EUROCONTROL outage causes flight delays across Europe

rsjaffe

They've now identified the problem:

The trigger event for the outage has been identified and measures have been put in place to ensure no reoccurrence. The trigger event was an incorrect link between the testing of a new software release and the live operations system; this led to the deletion of all current flight plans on the live system. We are confident that there was no outside interference.

https://www.eurocontrol.int/press-releases/statement-etfms-outage-3-april

New battery boffinry could 'triple range' of electric vehicles

rsjaffe

Re: How many battery "breakthroughs" is that this year?

"If you try even triple energy density of Li-Ion battery (0.875MJ/kg x 3) you're right next to gunpowder which has energy density of 3 MJ/kg. If you want increase it 5 times you're now in TNT territory (4.6 MJ/kg)."

And yet we drive around with even a larger bomb in our vehicles every day. Gasoline has an energy density of 45.7 MJ/kg

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