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Comment Re:It's about landmass (Score 1) 466

The second is, the neodymium in the magnets for the motors is only a rare earth. That tends to mean there's a fair bit of strip mining to get it.

Tesla doesn't use rare earth metals in their motors or batteries. I realise they are not the whole EV market, but they are a large fraction of it. There's a general downward trend in the rare earth consumption by the other EV manufactures. One example

Comment Re:Whatever (Score 2) 112

From SolarCity's 2015 impact report it seems that 70MW of installed power produced 28,630 metric tons of CO2. It's 2017 (which should have yielded further emissions savings over 2015), plus installing bulk might yield yet further savings.

But I'm a firm believe in the energy trap, so I think that's 28,630 tons of CO2 well invested.

Comment Re:Why do I need this? (Score 1) 105

At a guess, if you have a known quantity of red light time, you can tune the radio, adjust your seat, etc, and not get caught out when light goes green. This should lead to lower frustration levels for both you, and the cars around you.

For a car manufacturer who trades solely on the "experience" (let's face it, Audis are just over-priced VWs), you can hardly blame them for trying something like this.

Personally, I think there's better technologies they could be putting this R&D money into. But hey, each to their own.

Comment Re:Qualcomm doesn't make chips (Score 2) 110

My understanding is most server farms are connected to dedicated nuclear power plants anyway, so power consumption isn't an issue. Heat dissipation? Yeah, that might be an issue.

With recent news that Google is shooting for 100% renewable energy for its datacentres (and many others will follow suit), I'm not quite so sure that's true any more.

Comment Oxygen administration? (Score 1) 112

I wonder if there's a link between ALS ambulances and the practice of giving oxygen to heart attack patients?

A recent study in Victoria, Australia found that there was a 20% increase to the damage to the heart if given oxygen by ambulance paramedics.

Perhaps, in general, the BLS ambulances don't carry as much oxygen and thus administer it less frequently?

Submission + - Building your own wireless sensors (mysensors.org)

Henrik Ekblad writes: MySensors.org is packed with instructions for building your own wireless sensors. The sensor nodes automatically routes messages to allow communication with nodes far away and communication is bi-directional.

The community driven project has already created plugins for a bunch of different HA controllers to make the home build sensors work seamlessly with other propriety products.

The step-by-step guides will get you up and running quickly to detect motion, distance, temperature, humidity. The site also provide actuator examples for controlling lights with relays or blinds using a servos.

Sensor building blocks can be purchased everywhere and consists of Arduinos, NRF24L01+ transceivers from Nordic Semiconductors and an open source communication library.

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My idea of roughing it turning the air conditioner too low.

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