lutusp

45 ms·

481.
by lutusp 10y ago
> The light is traveling in a straight line ALWAYS, but merely appears (to us) to bend, because the space it's traveling thru (in a straight line) is itself bent. The space itself is bent. The light goes straight. Space is curved, a
482.
by lutusp 10y ago
> Star mass bends space, and the light merely "appears" to bend, when it traverses that space. It doesn't actually bend. On the contrary, it actually bends. Spacetime curvature is a real, not an apparent, effect. "Spa
483.
by lutusp 10y ago
My reply was only in response to this comment -- > Gravity decreases in proportion to distance squared between objects, but its not observed beyond a certain distance. -- not to the question of what detailed properties gravitation poss
484.
by lutusp 10y ago
> The only reason there's two kinds of "dark" is because both the space aspect (matter) of our math is wrong AND the time aspect (energy) is wrong. You're pairing space and matter, then time and energy, and comparing
485.
by lutusp 10y ago
I wish nautil.us would fix their broken page design so it doesn't fill one's browser history with duplicate links and keep one from leaving the site. This isn't a design choice, it's parasitic.
486.
by lutusp 10y ago
> Gravity decreases in proportion to distance squared between objects, but its not observed beyond a certain distance. This isn't true. F = GMmr^-2 has infinite range. This is true from a theoretical standpoint, and it's also b
487.
by lutusp 10y ago
> There is no evidence that dark matter even exists other than the fact that our universe is not expanding at the rate we think it should ... You're thinking of dark energy, the net effect of which is to change the overall expansion
488.
by lutusp 10y ago
Apparently the pilot's control was disabled by the camera, which, until it was removed, prevented either pilot's control inputs from having the intended effect.
489.
by lutusp 10y ago
> There's some altitude where 358kt indicated is Mach 0.9. Not really: http://www.aerospaceweb.org/question/atmosphere/q0112.shtml
490.
by lutusp 10y ago
The speed of sound varies with altitude. Nevertheless, at 30,000 feet, Mach 1 is 1,091 km/h, so the original statement is not correct (mach 0.9 at 30,000 feet would be about 982 km/h).
491.
by lutusp 10y ago
> Trolling, to me, just aggravates the actual problem: deep socioeconomic/racial/sexual inequities. Easy to flag as a problem in a world with so much blatant inequality. But a system designed to erase inequality would only have
492.
by lutusp 10y ago
However important it is, it's a separate issue and -- because most online comments are anonymous -- much harder to study.
493.
by lutusp 10y ago
> How is it possible to generate seven years of convincing sample data from historical trading data without overfitting your models? Simple -- create a large set of models, each using different selected parameters, run them against the m
494.
by lutusp 10y ago
"Silicon Valley Hedge Fund Takes on Wall Street with AI Trader" Another generic, contentless article using the standard outline: (name) takes on Wall Street with (scheme). Percentage of traders who beat the market average: 50%. Tr
495.
by lutusp 10y ago
> I get that, but we're not going to run a double-blind randomized study on whether car exhaust gives kids asthma. Yes, but the point I have been trying to make is that, when we don't do science, we need to say we haven't
496.
by lutusp 10y ago
> I don't quite get that the eHang commands such a presence in the public mind. I think it's only because they're the first, their craft is really a rough prototype, and in five years they'll likely be forgotten. >
497.
by lutusp 10y ago
Projects like this will eventually produce an airborne commuter vehicle, but: * It will resemble a scaled-up quadcopter (for which there's already an early prototype: http://www.theverge.com/2016/6/8/1188
498.
by lutusp 10y ago
> You have to make assumptions to reach a conclusion. Science isn't about assumptions, it's about evidence. People make assumptions every day, that's unavoidable, but we should be alert to the fact that it's not scien
499.
by lutusp 10y ago
> The author lost me at "Mathematical genius resides within every one of us — most people just don’t know it yet." An unfortunate hyperbolic opening line, the remainder of the article is much better. > However, saying anyone
500.
by lutusp 10y ago
> Can you name one source of pollution suspected of causing health issues, that meets the criterion of falsifiability from evidence? Certainly -- I can name a dozen, each of them demonstrated using scientific methods. Asbestos. Ionizing
501.
by lutusp 10y ago
No matter what glasses I wear, I still can't get past the WSJ paywall. It would be a public service for people to stop submitting links to this site.
502.
by lutusp 10y ago
Quote: "The only way to fix Linux is to take one distro, one set of components as a baseline, abadone everything else and everyone should just contribute to this single Linux." Essentially the article's point is that technica
503.
by lutusp 10y ago
I agree with your points. My comment was based on my personal experience as a radio amateur. When I was young, when Morse was still central to radio communications, I spent too much time learning how to send and far too little learning how
504.
by lutusp 10y ago
> There is essentially zero doubt about the causative link at this point. Science isn't based on hand-waving -- falsifiable empirical evidence is required. Any number of assumptions like this have fallen by the wayside over the deca
505.
by lutusp 10y ago
Apart from the political issues, I want to point out that air pollution can be objectively measured, but the connection with childhood asthma can only be conjecture for lack of rigorous scientific controls -- it's a correlation, not an
506.
by lutusp 10y ago
Not emphasized in the linked PDF is the fact that sending Morse code is relatively easy, but accurately receiving it is much harder. One would do well to spend the majority of one's time learning to accurately receive Morse code, and n
507.
by lutusp 10y ago
When writing shells it's possible to invoke standard libraries on both ends of the circuit to handle these communications/protocol issues without having to rewrite them.
508.
by lutusp 10y ago
See the table on this page: http://www.roymech.co.uk/Useful_Tables/Matter/Costs.html In one of the tables the cost for bronze (more durable than pure copper but having similar antiseptic properties) is listed as
509.
by lutusp 10y ago
> Communism would't work ... That's an example of a false choice. It's not a choice between corporate ownership of our information on one hand, and a failed governmental system on the other (which Communism certainly is).
510.
by lutusp 10y ago
> What you're missing is what security people call defense in depth. I didn't miss it, I deplore it. True "defense in depth" puts all civil rights aside. "Those who would give up essential Liberty, to purchase a

More ›