Catch up on stories from the past week (and beyond) at the Slashdot story archive

 



Forgot your password?
typodupeerror

Comment: Re:Buckling spring for life! (Score 1) 147

by jpatters (#49709493) Attached to: Mechanical 'Clicky' Keyboards Still Have Followers (Video)

Matias makes full-sized keyboards with mechanical switches that are much less expensive than the half-keyboards. They are priced from $130 to $150 or so. The half-keyboards are niche products and they are more expensive in part due to the tooling costs being a much more significant proportion of the overall cost of manufacture.

There are quite a few mechanical keyboards available on the market that are cheaper than Matias, and some that are more expensive. Unicomp has has both Mac and Windows layout keyboards for a bit less than the Matias boards. There are also a large number of offerings from various manufactures that use Cherry MX switches. The cheapest that I am aware of is the Monoprice Mechanical Gaming Keyboard with Cherry MX Blue switches, which is about $60. It's acceptable, but the Matias boards have a much higher standard of build quality.

Comment: Re:Pinto (Score 1) 247

by jpatters (#49567361) Attached to: The Engineer's Lament -- Prioritizing Car Safety Issues

Don't forget to watch out for the opposing lane of traffic when you are the first one to go when the light turns green. I can't count the number of times I would have been flattened if I wasn't paying attention in that situation, and this is with a delayed green. Never take your right of way for granted.

Comment: Re:My Casio Fx48 Calculator has a bigger range. (Score 1) 157

by jpatters (#49508489) Attached to: Mandelbrot Zooms Now Surpass the Scale of the Observable Universe

If you think a Googol is big (or a Googolplex), try wrapping your head around Graham's number.

I'll use "^" to represent a Knuth arrow.
Start with 3^^^^3, call that g_1.
Now g_2 is 3^^^...^^^3 but with g_1 Knuth arrows.
g_3 is 3^^^....^^^3 but with g_2 Knuth arrows.
G, or Graham's number, is g_64.

There are numbers with more digits than the number of sub-atomic particles in the universe, that if you repeatedly take the factorial of, over and over again more times than the number of sub-atomic particles in the universe, where the end result would be smaller than Graham's number.

Comment: Re:The 3d printed elephant in the room (Score 2) 52

by jpatters (#49336267) Attached to: Australian Company Creates Even Faster 3D Printer

Have you ever looked at the output from a color printer from the 80s? Color dot matrix was absolutely hopeless for anything serious, and ink jet was expensive and not really that much better. Banding was the norm. Of course there were exotic and expensive technologies like dye-sublimation, but they were very expensive. If you are paying attention, that looks a lot like the 3D printing landscape now. The Makerbot style additave printers will probably go away, like dot matrix; and the photosensitave resin ones will improve dramatically and rapidly, like ink jet did in the 90s. They will come way down in price until they are under $100. Even the other exotic technologies will come down in price, like dye-sub did.

Off the top of my head I can think of a dozen or so occasions in the last year where a 3D printed household item or replacement part would have been useful. Remember, it's not just the cost of the part. if you can't 3D print then there is all your time spent sourcing and obtaining the part in question, if it's even available, and then hoping that it's suitable. The factors that will make 3D printing practical for household use are speed and cost. Print speed is exactly what is discussed in TFA. Cost will come down just like every other piece of computer technology ever.

Comment: Re:Hackers? (Score 1) 47

by jpatters (#47683751) Attached to: Project Aims To Build a Fully Open SoC and Dev Board

Get a grip.

You lost interest in this project because the summary of the slashdot post decribed them as "hackers"?

FYI, a "hacker" is someone who finds uses for a technological item that were not intended/anticipated by the original inventor of that item. Not sure that really applies here, but it doesn't matter, because the wording chosen for a slashdot post summary should have zero impact on weather or not a project is interest-worthy.

Comment: Re:What about tetrachromate women ? (Score 0) 176

It is most likely an RGB display, so its color gamut would be limited to what can be made out of those three wavelengths, and not anywhere close to 94% of "nature's true palette". Seriously, if Apple made that claim about a display, they would be a hundred posts by now mercilessly mocking them.

Comment: Bad Thermostat Placement (Score 1) 216

by jpatters (#47024467) Attached to: Who controls the HVAC at work?

Often the problem is that the theremostat is not placed anywhere that makes sense.

One place I used to work, I discovered, through trial and error, that the temperature in one room was controlled by a thermostat in a totally disconnected workspace. Since the people in the workspace always wanted it warmer, the temperature in the disconnected room (which was basically sealed off behind a big thick locked door) would run away to 85 or 90, which would cause the temperature in the refrigerator in that room to go out of spec.

Fun times.

Comment: Many-worlds (Score 1) 608

by jpatters (#46839027) Attached to: Are Habitable Exoplanets Bad News For Humanity?

If the Many-worlds interpretation is correct, then it should be no surprise that we find ourselves existing in a world in which we have avoided an extinction catastrophe. If that outcome is sufficiently rare, then we should not expect to find any other advanced civilizations, because they will have all been eliminated by their own extinction events with high probability. Therefore, if there is a "Great Filter", and Many-worlds is true, then all advanced civilizations are isolated in their own private Everett branch.

Comment: Re:yea no (Score 4, Informative) 223

by jpatters (#46682155) Attached to: Why There Are So Few ISP Start-Ups In the U.S.

Oh stuff a sock in it.

The cost for the infrastructural build out of basic telephone service, which is what the incumbent telcos are required to provide, was paid for decades ago and with significant taxpayer subsidies. None of the incumbents are required to provide universal internet service at all, let alone reasonably useful universal internet service, so your complaint is bull crap. Also, Comcast/Time Warner/Charter etc are not required to provide any level of universal service.

Comment: Re:Two Games (Score 1) 167

by jpatters (#46674187) Attached to: A Rock Paper Scissors Brainteaser

Re-read the GP. The claim is that when the opponent responds by playing scissors 50% and rock 50%, you will win 4/6 of the time when they play rock and you will lose 4/6 of the time when they play scissors, which makes it 50/50. The stronger claim is that the opponent can adjust to any consistent strategy that you choose, ultimately making it a 50/50 game.

Comment: Re:Would we... (Score 1) 824

by jpatters (#46608209) Attached to: Some Mozilla Employees Demand New CEO Step Down

It is you who have made the astounding claim that "scientifically" there are "three races of humans", so the burden is on you to cite your sources. Current science makes no such claim, and you should stop spouting off on things about which you have no clue.

High school biology class is hardly a definitive venue to learn about science that is more current than the 1950s.

The world will end in 5 minutes. Please log out.

Working...