HNHacker News
TopNewBestAskShowJobs

_-__---

174 karma · joined June 30, 2014

submissionscomments
_-__---··on Self-solving Rubik's Cube
I like the rescramble idea. You could maybe go one step further by varying the difficulty of the rescrambling - I'm not sure if there's an established distance metric between rc states (something like a levenshtein distance, "minimum-number-of-changes-needed"), but the program could shuffle the cube out to some threshold on that metric to get easy, medium, hard, etc.
_-__---··on ‘My Hovercraft Is Full of Eels’ in Many Languages
How would one say this in a better Maori translation?
_-__---··on SpaceX’s Dragon capsule successfully returns from ISS resupply mission
Ol' Musky?
_-__---··on Integrated Information Theory of Consciousness
Here's the web page of the main research group developing this theory at the moment:

http://integratedinformationtheory.org/

Giulio Tononi's work is very interesting. I suggest anyone interested in sleep/consciousness research take a peek at what his group is doing.

_-__---··on Electrick: Low-Cost Touch Sensing Using Electric Field Tomography
I'm sorry if I'm missing something, but did you mean to reply to a different post here? I don't quite see the relevance of what you're saying to anything that the original post covered.
_-__---··on Tesla unveils its new ‘sleek and low-profile’ solar panel made by Panasonic
Not sure about the products/companies you're listing, but cult of personality must have a lot to do with the extra press. People will click on links to stories about Tesla/Elon/SolarCity without the journalists having to do as much.
_-__---··on Fourier transform – A math tool used in optics, MP3s, JPEGs and more (2013)
They can[0]; however, this requires some further construction.

One major benefit of the sin/cos basis is that each basis function maps uniquely to a dirac delta in frequency space. This allows for power/energy symmetries between time and frequency domain representations of a signal and allows for more tenable frequency filtering, e.g. removing 60/50Hz noise or isolating a particular frequency band.

A haar wavelet or modified square wave basis may provide you with a simple orthonormal signal basis, but each wavelet has a frequency representation with infinite support in frequency space. This is (a) untenable and (b) eliminates the possibility of frequency-specific filtering. Wavelet analysis is more useful in specific cases.

[0] https://en.wikipedia.org/wiki/Haar_wavelet

_-__---··on University of Tokyo Graduate School Entrance Exam – Mathematics (2016) [pdf]
I get stuck after the first few subproblems on all three. Does anyone have a PDF of the solutions? Are the solutions ever released?

I'm a little rusty on my linear algebra.

_-__---··on To fix L.A.'s traffic, we need tolls
24hr service would be very expensive, but it seems that they should run the transit services until a little after the majority of bars and clubs close. It was nice here in Boston when they ran the T until a little past 2AM; they've since pulled that back to 12:30 or so. It can be kind of a pain, but Uber/Lyft are well established here.
_-__---··on Ask HN: If the bots take your job, what would you do?
Cheers 2: Topeka
_-__---··on JPMorgan Software Does in Seconds What Took Lawyers Many Hours
To me, that reads as the author writing off blockchain moreso than the JPM representative.

To be fair, there are plenty of ways that blockchained systems can fail.

_-__---··on Introducing Handle – Boston Dynamics [video]
That 80's jump-freeze-frame was fantastic

I want to see them take this to a skate park

_-__---··on Staring into the Soundless Dark: On the Trouble Lurking in Poets’ Bedrooms
we weren't event allowed octopus lamps, but bears have been shown to be effective fire prevention measures.
_-__---··on Why Do Millennials Hate Groceries?
No real thoughts about the content of the article, but shouldn't the Atlantic be able to produce a better looking plot than a stock, calibri-fonted MS Excel line-graph?
_-__---··on Mathematicians Are Overselling the Idea That “Math Is Everywhere”
the evidence given in the article doesn't directly support this, but the author may have tried to get at the "[those that have] the necessary talent can learn any part of maths" statement you made. Without exposure to and engagement with a comprehensive education in mathematics (even just basic numeracy and arithmetic), it's incredibly difficult to teach oneself any given mathematical concept. Access to maths educational resources is ostensibly unrestricted, as (at least in the US) library cards are free of charge and the internet is readily accessible there; however, one can easily point at the many banes of lower-income households as immediate barriers to receiving any sort of education, either autodidactic in nature (i.e. sitting in a library with an geometry textbook) or through public schools.

It might be worth thinking in this "math for and from the elites" mindset when describing public aversion to the subject. Seeing it as beyond oneself or not relevant to one's life lends little towards anyone's desire to learn anything about it.

It's easy to say "why don't they just do it," with some diffuse definition of "they" in mind, but even the most basic things can be hard to get for the poor. A proper maths education is one of them, I think.

_-__---··on The illegal city of Somerville
Hey, my apartment is on there!

Maybe this is just the fame going to my head, but I sure would like some semblance of a yard.

_-__---··on Former NASA chief unveils $100M neural chip maker KnuEdge
Here's some spec on the chip itself (KnuEdge seems to be a larger holdings company of sorts, the chip is more associated with subsidiary KNUPATH):

https://www.knupath.com/products/hermosa-processors/

_-__---··on On the Nature of Creepiness [pdf]
Clown-garbed garbage collection service, using found trash to taxidermy up some foxes?
_-__---··on Claude Shannon: Tinkerer, Prankster, and Father of Information Theory
I think that it's good to pursue your interests, no matter how trivial (so long as they don't harm others, I suppose); however, it helps to work in a field paying you to do just that. Bell Labs was notorious for having a laissez-faire approach to managing its researchers.

Now we have to resort to spending company time posting on news sites and browsing wikipedia.

_-__---··on Congress is clueless about tech because it killed its tutor
I doubt that PhDs from Boeing or FFRDCs are going to real strangers to "real-world research problems."
_-__---··on Why some animals have venoms that are more lethal than they apparently need
So replenishing venom supplies may result in an increased metabolic load post-extraction, but that increase may not be so much when compared to another method of hunting. For example, it's probable that the heightened metabolic load associated with a python crushing/strangling its prey is a substantial increase from the animal's ~ergodic resting state.

If anyone has numbers on this, please link them!

Also, injections are probably not going to be clean and ideal. Having a toxin that does the job o(1000)-fold with a full delivery volume will still do the job with a tiny fraction of that in the event of a partial toxin delivery. This will still result in the death of the prey with a single, albeit flawed, attack.

_-__---··on Sex Is a Coping Mechanism
that + chill = more sex?
_-__---··on Morocco to switch on first phase of world's largest solar plant
also, what can be done with the hot water coming out of the system?
_-__---··on Around the World in 33 Keyboards
QWERTY was laid out (at least partially) with the intent of preventing typewriter jams and increasing productivity. This was done by placing commonly paired letters far apart from one another; maybe this was also taken into account when designing each other language's keyboard. Letter pairs will differ, presumably, so the important keys to separate will change from language to language.

That's my intuition, anyways.

_-__---··on A visual exploration of the spatial patterns in endings of German town names
"-ow" implies "Poland was here?"
_-__---··on Physicists believe they can create matter from colliding photons
more completely, it's E^2 = (m c^2)^2 + (p c)^2 where m is the rest mass of the particle and p is the current momentum. It's a nice triangle relationship.

As for the interpretation thereof, you're going to need someone else.

_-__---··on Martin Shkreli Arrested on Securities Fraud Charges
I guess that Wu Tang album really spoke to him
_-__---··on Silicon Valley Is Not Driving Jobs Growth
there would be a hell of a lot more snapchats of people driving over that interplanetary bridge
_-__---··on The secret message hidden in every HTTP/2 connection
BACKwords-ly Reasoned-Out Name for Your Movement
_-__---··on Dentists reveal new tooth decay treatment
It's not the content of the book that this person is talking about, but rather their disdain for some constructed "people" for not reading. Not sure where the ire is coming from, but it's more of a "you're not wrong, you're just an asshole" comment.

But, here I am writing this and here you are reading it.

Page 1 of 3Next →