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The discovery of intelligent alien life would be met predominantly with...

ChrisMaple Re:It'll never happen (285 comments)

Slow thinking creatures would be at a tremendous evolutionary disadvantage. They would not be the dominant species on their home planet, so unless the dominant creatures send them, they won't come visiting us.

yesterday
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The discovery of intelligent alien life would be met predominantly with...

ChrisMaple Re:It'll never happen (285 comments)

Shirley he isn't Sirius.

yesterday
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The discovery of intelligent alien life would be met predominantly with...

ChrisMaple Re:It'll never happen (285 comments)

It has long been a staple of science fiction that FTL drives can't be engaged near solar systems.

yesterday
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Fake Engine Noise Is the Auto Industry's Dirty Little Secret

ChrisMaple Re:Just give the option to turn it off... (820 comments)

The Mazda Miata (1989) had an exhaust system carefully designed to sound like a cheap 1960s English sports car.

about a week ago
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Fake Engine Noise Is the Auto Industry's Dirty Little Secret

ChrisMaple Re:I want silent vehicles (820 comments)

Tires rolling on pavement make noise. There's no reason to add to it.

about a week ago
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Is D an Underrated Programming Language?

ChrisMaple Re:COBOL (385 comments)

"Power" includes economy of expression. If 5 lines of language A requires 500 lines in language B, language A is more powerful.

"Power" includes things like directly accessing hardware.

about a week ago
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Samsung's Advanced Chips Give Its Cameras a Big Boost

ChrisMaple Re:Crop + correction makes this pointless (192 comments)

Deconvolution is a tricky game. For one thing, as you mentioned, the deconvolution matrix varies across the frame, and for another, it often must be much larger than the related convolution matrix (PSF). It is often ill-conditioned (effectively, that means there's a number close to zero in the denominator), and it always magnifies noise. If there are saturated regions in the image, they can't be handled properly.

Deconvolution and other postprocessing can improve images, but turning a grey mess into a beautiful full color photo is something that can usually be done only under tightly controlled conditions. All too often, there's something screwy in the results.

about two weeks ago
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Samsung's Advanced Chips Give Its Cameras a Big Boost

ChrisMaple Re:Crop + correction makes this pointless (192 comments)

There are limits to what you can correct in software. Correcting chromatic aberration greater than 2 pixels is futile. Correcting barrel or pincushion distortion reduces resolution. Sharpening images makes noise worse and introduces artifacts such as ringing. (Trying to reduce noise diminishes textures.) Software helps, but great software with a mediocre lens is inferior to mediocre software with a great lens.

about two weeks ago
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Samsung's Advanced Chips Give Its Cameras a Big Boost

ChrisMaple Re: Technically DSLR doesn't specify a mirror or n (192 comments)

Some camera manufacturers used leaf shutters in or behind the lens, in front of the mirror, on some models. They included Topcon, Kowa, Kodak, Hasselblad, Bronica and Rollei.

about two weeks ago
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Samsung's Advanced Chips Give Its Cameras a Big Boost

ChrisMaple Re: Technically DSLR doesn't specify a mirror or n (192 comments)

It takes a mirror to be a reflex camera, and it is only related to the shutter in that the mirror has to not block the light to the sensor/film when a picture is taken. Twin Lens Reflex (TLR) cameras use a fixed mirror, unrelated to the shutter. Beam splitter Single Lens Reflex (SLR) cameras like the Canon Pellix and Canon EOS RT use a fixed mirror unrelated to the shutter. Conventional SLRs use a flip-up mirror that moves before the shutter opens and flops down after the shutter closes.

Reflex refers to the optical path to the viewfinder, involving a reflection.

about two weeks ago
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Parents Investigated For Neglect For Letting Kids Walk Home Alone

ChrisMaple Re:The Dangers of the World (784 comments)

Wrong. The parent would probably be murdered by the government before his children were taken away.

about two weeks ago
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Parents Investigated For Neglect For Letting Kids Walk Home Alone

ChrisMaple Re:The Dangers of the World (784 comments)

When did sense have anything to do with law?

about two weeks ago
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Lost Beagle2 Probe Found 'Intact' On Mars

ChrisMaple Re:Design failure (130 comments)

1 cu. in. should not be a problem for reasonable efficiency; there are good techniques for transferring heat to radiators, etc.

about two weeks ago
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Lost Beagle2 Probe Found 'Intact' On Mars

ChrisMaple Re:design flaw with placement of antenna (130 comments)

They have images of the probe.

Take a look at those images. They're trying to deduce a whole lot out of perhaps 10 pixels. If they has dropped a Vespa on the surface from 1 km up, it might look the same.

about two weeks ago
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Ask Slashdot: Sounds We Don't Hear Any More?

ChrisMaple Re:The whine of the flyback transformer (790 comments)

CRTs run up against fundamental laws of physics. One is focusing, bright screens require a lot of electrons per unit time and electrons repel each other. Getting them into a small place (sharp focus) is difficult at best. Another is atmospheric pressure, at 1 ton per square foot big screens need thick glass if they're curved and VERY thick glass if they're flat.

With CRT phosphors, there's always some compromise between ghosting and flicker, and one can't be completely eliminated without worsening the other. There's some possible improvement available with high refresh rates, but before long a high refresh rate multiplied by the number of pixels on the screen results in an unacceptable rate for modulating an electron stream. (This can be reduced with multiple electron guns, but that introduces alignment problems and huge costs.)

All in all, something like a 40" 4k CRT would be enormously expensive, heavy, and a maintenance nightmare.

about two weeks ago
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Ask Slashdot: Sounds We Don't Hear Any More?

ChrisMaple Re:Related - the clack of wheels on the tracks (790 comments)

Interesting. Rails are heavy, and the pressures involved in lifting up a rail due to thermal expansion would cause elastic deformation. If the rail were constrained to not move horizontally, a pressure of about 500 psi would correspond to 1 inch per mile. Not only is that not enough to lift rail weighing 30 lb/ft (about 8.5 sq. in. cross section), it wouldn't support the rail if it were first lifted and then relied upon pressure to keep it up.

about two weeks ago
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Silicon Valley's Quest To Extend Life 'Well Beyond 120'

ChrisMaple Re:The longer you live...Cancer could be your rewa (273 comments)

There's more to cancer than mutations resulting in fast-reproducing cells, there's also the failure of the immune system to recognize and kill the bad cells. Reducing that failure is one of the techniques/goals of cancer research and life extension in general.

about two weeks ago

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