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Comment: Yes: not all infra-red is the same (Score 1) 140

by Richard Kirk (#48478411) Attached to: Scientists Develop "Paint" To Help Cool the Planet

The actual article is a bit shallow on detail, but here's my interpolation...

Infra-red is quite a broad bit of the spectrum. It starts at about 800nm as light we can't quite see, and security cameras use this band with an infra-red illuminant. If we go down to about 2000nm, we are into the mid-band where some IR cameras operate. These can see hot objects but cannot people by their radiated body heat. There is a gap at about 3500nm where water vapour absorbs and emits, and cameras do not work well. Then there is another band at about 7000nm where the thermal cameras that can pick up body heat work. The cooler you are, the greater fraction of long wavelength you emit. (NB: if the exact wavelengths are important, please check as I am typing this off the top of my head).

Most black paints absorb all infra-red wavelengths equally. Some white paints will absorb the far-infra-red. What you want, and what I think they have done is to make somethng that reflects down to 2000nm, and then absorbs beyond about 400nm. This will reflect a lot of the heat from the sun, but will still radiate the heat from the building.

Does it work? Will it still work when it is dirty? I don't know, but at least it does not violate any thermodynamic principles.

Comment: Re:Rather late (Score 0) 298

by ljw1004 (#48475297) Attached to: Windows 10 To Feature Native Support For MKV and FLAC

2c per CD? How does that price work out for those of us who keep our definitive backups on AWS or iCloud or OneDrive? And who also would need to pay for a fatter internet connection to get at all the files?

I have no doubt that FLACworks great for the niche who have lots of CDs, lots of hard drives, and who have time and money to spend curating them. But really, if you have kids or emmigrate or whatever, the FLACs are as good as gone when you realize you don't have the time or money you need to keep them useful.

Comment: No easy fix? (Score 1) 510

by Richard Kirk (#48466017) Attached to: Ask Slashdot: Why Is the Power Grid So Crummy In So Many Places?

I live in a large village or small town. I get a lot of power outages. Some of these last for hours. Most of the rest of the village does not get these - just a small clump of houses around the church. Our cable comes underground from Hemel Hempstead. The rest of the village gets power from the pylons that run alongside the M1. We can claim back money for the power outages.

I would imagine our group of houses has problems because (a) we are at the end of a spur (b) we got electricity before anyone else, and before the M1 was built, so our lines are particularly old, and (c) the power distribution network has probably shifted, and our little bit has not been altered to reflect the changes. If you live out in the sticks, you become more vulnerable: I remember a house where the power used to trip out when the transport cafe about a mile away turned off their grills last thing at night. One of the downsides of generating your own power may be that the network only has to fill in when we have a number of dull, still days. The US equivalent is probably hot days where everyone turns up the airconditioning.

It is not because (a) our lines are overhead, or (b) our corner of the village is particularly greedy, or (c) that the power company does not have to pay when services are disconnected. Beware of people suggesting 'obvious solutions' without evidence.


Comment: Re:Hmmm ... (Score 1) 449

by TapeCutter (#48465269) Attached to: The Schizophrenic Programmer Who Built an OS To Talk To God
He does have a point, I'm a regular contributor in your sense of the word. I recognised TempleOS as being connected to a slashdot user, so he is a "regular" in the sense that another regular recognises him. I'm also guessing that omnichad is of british descent since his use of the word mimics the way the word would be understood in a british pub.

Comment: Re:Hmmm ... (Score 1) 449

by TapeCutter (#48465197) Attached to: The Schizophrenic Programmer Who Built an OS To Talk To God
AC but still a brave post. The fear of the "mentally ill" that "normal" people have is a major problem. I have also had auditory and visual hallucinations on numerous occasions, however it doesn't make me doubt my own sanity since it always happened after working a 73+hr shift on a fishing trawler. The visual ones always happened in a moving car, they were interesting not scary, they would go away if I shifted my visual focus. Auditory ones happened when it was quite and I was alone. They would go way completely after get a good sleep.

Perception is everything. Perhaps if all "normal" people were given a mild acid trip after xmas dinner there would be less fear of the "mentally ill".

Comment: 'A' for effort. (Score 1) 449

by TapeCutter (#48465117) Attached to: The Schizophrenic Programmer Who Built an OS To Talk To God
Indeed! Vincent Van Gogh did his best work while suffering schizophrenia, Starry Night and Sunflowers are now considered the work of one of the greatest artistic geniuses to ever walk the earth. This guy is (unknowingly?) attempting to put the "art" back into the "art and science of programming", he's unlikely to succeed but he deserves credit for his effort.

The trouble with opportunity is that it always comes disguised as hard work. -- Herbert V. Prochnow