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Comment Re:Ok cool (Score 5, Informative) 104

The rxscanner is a very cheap portable spectrometer, so it is probably a near IR or short wave IR device with quite poor spectral resolution.

On top of that, there is a lot of clutter in those spectral bands, not to mention measurement problems caused by varying reflectivity and light levels between samples taken in the wild

So it isn't as simple as taking a scan and comparing the spectra you measure to a database, there is a lot of noise.

Machine learning/AI models to help with this are quite common in this field, and have been around for decades to help with spectral library lookups - long before the current LLM hype phase.

Comment Re:For the discerning consumer ... (Score 2) 72

Silly consumer. Don't you realize it's your civic duty to purchase product?

It doesn't matter what it is, just purchase product.

After you've received product, discard product and purchase next product. Quality of product isn't relevant to the conversation.

What are you, some sort of commie trying to collapse the US economy?

Comment Re: This is concerning (Score 1) 147

So the radiator has to be simultaneously both bigger than the space data centre and also smaller than the space data centre so it can stay in the space data centre's shade away from the sun.

Cool, cool maybe they can use Time Lord technology.

Like I said, get back to me when you hsve a cost effective design that works.

Comment I hate when people get this wrong. (Score 2) 8

BB84 doesn't create keys, it's a key *distribution* protocol

The key itself is a one time pad generated using whatever random number generator you wish.

BB84 is a protocol that distributes the key to your communication partner using a quantum physics technique plus a public open channel to guarantee that no one has eavesdropped on or tampered with the key.

For the record, in BB84, the public channel must satisfy certain very strict requirements which I've never seen any BB84 implementations get right - even when they do the quantum physics correctly (which is another part people often get horribly wrong).

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