skysight-inc/HackerNews huggingface dataset:
The feed algorithm is now an utter mystery: they somehow manage to show me things twice, and there is lots of interspersed garbage. The endless scroll makes it very obvious very quickly that this is now a “chore” so I just stop. I also log in far less than before; certainly not every day as I once did…perhaps weekly (and even then, I somehow see updates from 2 or 3 friends tops).

The mobile interface is also ridiculous. My friend’s phone was hot and he complained about his battery not lasting…he wanted to upgrade his iPhone 6 because of it! What was the real problem? The Facebook app, ALONE, consuming upwards of 30% of his battery!!!

Then there is the automatic distrust I feel these days whenever I see “log in with Facebook” or similar things. I just assume that this can’t be a good idea, kind of like receiving a scam E-mail. That kind of pattern is going to tarnish Facebook’s prospects long-term.

And why is Facebook chat supposed to be so great? What is new about this? I am so tired of technology falling into “pits”, where just because a company has your data you are supposed to suffer through whatever software stack they create. Microsoft did this with documents, now I am supposed to use a Facebook app just to reach anybody? No.

We used to know how to create standalone clients and open protocols...let’s get back there again and let Facebook die.
It is dangerous, but I wouldn't call it immediately lethal. My dad is a engineer specializing in large refrigeration systems and in 10-15 some years, they had 1 ammonia fatality in a company of 40 people or so -- worker opened valve of refrigeration system while it still had ammonia in it, large concentration of it got blown pretty much straight into their face (and obviusly lungs) he died at the hospital.

But they had other accidents (welder welding a fuel canister with fumes still in it and other such crazy or stupid things) -- this was post-Soviet environment with almost no safety controls.

The nicer property about it, is it is easy to detect leaks due to specific smells.
Gravitational waves (GWs) propagate a _change_ in the gravitational field. Consequently, GWs are only shed by accelerating matter where the change in motion is not rotationally or spherically symmetric.

Spherically symmetric gravitational collapses (of dust or gas, for example) are certainly systems of accelerated matter, but do not shed gravitational waves. Rotating spherical bodies also do not shed GWs. To first order, this means the rotation of stars and planets do not shed GWs, although a planet revolving around the star in an essentially Kepler orbit will shed GWs, as will a pair of stars in close orbit around each other.

GWs solve the apparent removal of momentum-energy from a system where there is no removal of mass-energy by non-gravitational radiation. For most systems the energy loss is negligible. That's why the first GW detection involved a late stage inspiral of two compact massive objects with no way to ditch their angular momentum electromagnetically or via neutrino (or other dark matter) emission.

GWs themselves have spin 2 symmetry; in theories with gravitons, those are spin-2 gauge bosons, typically massless (because they are long range), and you get large numbers of them forming the classical GWs, just as you will find large numbers of photons forming a bright flicker of light, although you can detect tiny numbers of photons because electromagnetism is relatively strong -- tiny numbers of gravitons are not going to be detectable by humanity any time soon.

It's not curvature (and certainly not gravitational forces) heating up accretion disks. The matter in the disks move on intersecting geodesics and occasionally collide. Such collisions tend to ditch the particles' momentum into emitted photons.

Hawking radiation is an effect of accelerated observers seeing more (and more energetic) particles than non-accelerated ones, and gravitational collapses producing an acceleration between past and future observers. Where a past observer sees a tiny number of low-frequency particles in the "vacuum" outside the collapsing object, a future observer (after the horizon has formed) will see a larger number of higher frequency ones. The acceleration is curvature dependent, and curvature just outside the horizon depends on black hole mass -- more massive black holes have less curvature just outside the horizon (which is further away from the gravitational singularity or whatever is at the centre of a black hole). These particles near but outside the horizon can escape, which takes mass-energy away from the dynamical spacetime just outside the horizon. That in turn causes the horizon to retract and that exposes stronger curvature. That in turn produces a stronger acceleration for further future observers, and the process continues -- that's black hole evaporation.

Hawking radiation is always emitted, for SMBHs that only grow by incidental interception of CMB radiation, and even for stellar mass black holes. Infalling matter simply replaces (and then some) the outgoing "fossil" infrared radiation from the space just outside the black hole as the horizon was forming.
One of the rods was bent, and the valves in that cylinder were also bent because the piston had struck them. I still have that bent rod/piston in a box somewhere as a souvenir: the bend was pretty significant.

What's weird is my wife actually managed to get the car restarted after a while, and drove home that way!! It was making a terrible tapping noise though. I'm not sure how it was running that way; I didn't investigate too closely. This was a 2000 Acura Integra GS-R, by the way.

Anyway, I left everything alone in the other 3 cylinders because that all looked fine, and I replaced the piston, rod, and journal bearings on the bent one. I also replaced all 4 valves. It wasn't really that hard; I took the head and new valves and valve seals to a shop that specialized in rebuilding cylinder heads and they cleaned it up (it already had close to 100k miles at that point, so there was a lot of carbon build-up) and replaced the valves. They also put together the piston and con-rod for me as I didn't have a press for that. Then I just did the standard bore honing and put it all back together (and cleaned up the domes of the other pistons while I was at it). Worked great after that. The total cost wasn't much either; the bare parts only came out to a few hundred IIRC, from one of those online OEM parts sellers, and the shop work was $250 IIRC. The only specialized tools I needed were torque wrenches (which you should have anyway, but they're absolutely critical for engine work), and an air impact wrench (the crankshaft pulley bolt on that car was a real bear), and a drill-operated bore hone (cheap).
I wear my Pebble all the time, I imagine I'm Michael Knight or Penny (the niece of Inspector Gadget).
I use it for swim lap tracking, counting my steps, measuring my run, my sleep, whatsapp and e-mail alerts, monitoring cryptocoin value, watchface with a 24 analog display with sun position, sunrise and sunset marks, 'is it going to rain in the next few hours' early warning, music remote control, calendar and todo list, voice recording and picture remote, starchart, compass, geocaching and ingress assistent and weight-tracker with a battery life > 1 week.

Now it's just a bit thinner then the Apple watch, but the new Apple watch will be thinner then this Pebble. Will the new Apple Watch be waterproof, have GSR monitoring, headset and keyboard pairing, wifi, gps, a camera and match the weeklong battery-life?

I'd be tempted, but how developer friendly is the platform compared to Android Wear and Pebble (C and/or Javascript)?
Or... DID EVENTUALLY disrupt. Or DID get killed and forgotten when it didn't disrupt. Apple has had it's share of failures.
Make sure they're commission incentivized. I learned this the hard, expensive way. If there's a way to structure equity grants around sales performance, do it. At the very least, make sure you have minimum requirements beyond 1 year of time for your cliff on any equity agreements - ideally, attach a reasonable sales target as a schedule.

Don't let them sell you on vesting based on time - they're not adding value if they're not selling.
> it is not at all about "just working hard". It's about working smart

That doesn't change my point.

> To know the truth about a country, check if there are walls around a country to keep people in, or walls to keep people out.

A very broad brush on an irrelevant issue (relative economic opportunity between nations) to the problem at hand.
It is complicated to account for inflation, and there would certainly be a lot of debates about the details, but I think we should do it anyway. It's ridiculous that in a low-inflation environment such as the one we've been in for several years, capital gains are still taxed at a much lower rate than income. In a normal- or high-inflation environment, we should do our best to estimate the real gain, and tax that at the income rate.

But personally, instead of increasing the capital gains tax to match the income tax rate, I'd rather see us lower the income tax to be closer to the capital gains rate, and make up the difference with a federal VAT. Taxing consumption just makes more sense than taxing income.
For what it's worth, I find the ability to add a weather widget to my watch has been a major win for me. Just a little number in the corner giving me the current temperature. It's that sort of thing that has won me over to the Apple Watch.
I don't think the argument here is that the Apple watch is lacking features to make it useful. It's just an extra pointless gadget for most people, at least so far.
White labels and dubplates in general hearken back to the sound system culture that originated in Jamaica [1]. Mostly a means of getting the newest songs fastest; record something in the morning, press your dubplate that afternoon, play it out that night. The unofficial nature of the recordings makes it easier to hop around copyright stuff and not clear samples, etc. The song Alicia by Mala jumps to mind [2], I don't think it's ever seen a proper release because of the heavy use of Alicia Keys samples.

1. https://en.wikipedia.org/wiki/Sound_system_%28Jamaican%29
2. https://www.youtube.com/watch?v=zpV7radKuwo
If there's no salary or equity being offered, the company wouldn't be able to sign a binding contract with the programmer, since they'd be offering them nothing in return for their work (no "consideration"[1]). Thus, there would be no "work for hire" agreement, and the programmer, not the startup, would own all the intellectual property they created.

Also, if it's a for-profit business, paying zero salary for useful work would be violating federal and state minimum wage laws (in the U.S.).

[1] https://en.wikipedia.org/wiki/Consideration
I've been swimming with my apple watch for several months. Heart rate monitoring works (not sure if it's less accurate somehow? but it works), but there's nothing out there for tracking laps. The screen is also basically impossible to use while the buttons are too easy to trigger accidentally, so I start a workout and lock the watch, then unlock after I get out of the pool.

I was considering writing my own app for laps, and I do believe there was a story shortly after the watch came out where someone else worked on an app like that, but obviously it would not be allowed on the store. :(
> Its not the poor neighborhood. Its the poor ideas in people's heads. Change that and the neighborhood changes too.

An interesting notion, but is there any data that backs it up?
Email is not SMS
Startups have won on a lot less than the feature / ux innovation the author just laid out.

Forget google - build this with a "Show HN:" to find a cofounder!
The staff doesn't care if you get jet lag. They turn off the lights for as much of the flight as possible so that people go to sleep, or at least stay quiet. Less work for them!
Github source - https://github.com/twitter/pelikan
If you don't have much of an education, danger often pays.
SEEKING WORK!
Location: Portugal

Remote: Yes!

Relocate: No!

Technologies: Full Stack JS (Angular, React)

CV: http://stackoverflow.com/cv/sten

Email: sten.muchow@gmail.com
I love being able to keep my phone ringer completely off all the time, and yet never miss a call. "Need" it? No. Super convenient and gives me an advantage? Yes.
It doesn't seem like a very compelling product to me at all. However, I think people made way too much hay about the expensive gold ones (Apple Watch Edition). Its existence doesn't mean Apple is a jeweler now, it's just the same product with a different metal that costs a lot. Apple makes consumer electronics, including this one which at current seems to lack utility. From what I know, most people are buying the low-end $350 aluminum one and very few at all are buying the gold one.
As bondaburrah points out in the sibling comment, there are probably no consumer sound cards in existence that would be able to record a non-preamplified vinyl recording. So the RIAA equalisation issue is moot.
There is a Chrome extension with a similar concept that I enjoy:
https://chrome.google.com/webstore/detail/mortality-new-tab/...
I'm not sure to what degree I'd put oil rig worker (or even oil firefighter) in the same category as those. A couple of them of pretty much winner take all jobs and a couple are probably "don't have much of a choice" jobs if you live in certain locations. Oil jobs tend to be pretty well-paying blue collar in return for long hours/physically demanding work, week+ on/off schedules, and some level of increased risk (which seems to be concentrated in new workers).

I don't really disagree with your basic point though. I actually worked as an engineer for an offshore drilling company out of school. And, yes, I'm sure there were dangers that the average SV programmer doesn't have but it was good job, paid well for the time, and I only had one relatively minor job-related injury.
> Not everything is a conspiracy.

They are hiding it by using front companies, etc. So I think it qualifies as a conspiracy.
Dude that's really callous. There are many people that are taking drugs that make them feel the same everyday
Generalize at n=3
This piece of code doesn't "solve" the problem, it's a crude bruteforce implementation. The problem is hard for a reason.

Another way this code could be useful would be to showcase good readability practices, but it doesn't.
Yikes. If the CMO of Airbnb actually said that, that's awful.
Interesting. There is clear animal data showing that food timing is a strong input to ththe circadian clock, I hadn't seen it applied to people before.
I want an Apple Watch, but I'd much rather have a new G-Shock Frogman. For some reason, having a rather fragile and easily obsoleted watch doesn't work for me. Maybe I'm old and moldy (barely over 30) or it's what I am used to. I might try and pick up a used one on Craig's List eventually to try out. Maybe I'll change my mind once I try it for a bit.
Why use front companies and hide their activities? They are domestic law enforcement and not intelligence; shouldn't what they do be mostly out in the open?
Maybe science nerds tend to be good at mechanical work, but surely it's not the case for language nerds, history nerds or any of the many other possible areas of nerdiness.
My only issue with the Thinkpad x220 is the screen resolution. Fix that, keep the keyboard and buttons that one uses with the trackpoint, and I will never buy another laptop again.
Given that it weighed ~50 pounds and failed in a variety of environmental conditions, it's no surprise it wasn't adopted.

[1] <https://www.quora.com/Why-was-Dragon-Skin-armor-rejected-by-...
Learning Rust: Closures (through a Naive Circular Buffer)
When I rip vinyl I want as little processing as possible, so no messing around with high pass and pop removal. If it's new or decent condition vinyl the pops and hiss will be barely audible anyway.

Far more important to have a decent MC cartridge, and make sure it goes through a decent phono (RIAA) stage, which generally means an older hifi amp, or not-cheap hifi component.

Any phono stage of the last 20 years, or the "rip your old records" turntables generally use lowest quality crap going.
Just to nitpick for a second, the vast majority of ammonia that moves from fertilizer to algae blooms comes just from farm runoff. Many farms still use flood irrigation and many others end up timing fertilizer right before big rainstorms in the spring. The water runoff is how the ammonia makes it into the water supply, not from the food and then sewage.
Writing long email messages is one of the last things I would consider a waste of time. I am too often left confused or wanting more information after reading short messages I receive from other people. People waste entire hours or days every month doing things that are actually a waste of time; it is there we should look if we want to have more time. Reducing the length of messages is just sloppy.

I like to read well written and thought-out email, not short SMS messages like suggested by the (two|three|four|five).sentenc.es policy.
"because economies outside of the US are in a terrible shape overall with unemployment rate routinely above 10%."

Nice stats you just pulled out of your ass
This would explain why my 5mg pills are causing me terrible sleep problems.
One thing that would have helped me avoiding burnout -- make certain you are healthy.

E.g. no bacteria infections, no sleep apnea, and no food intolerances that make you chronically tired. And many other possibilities.
nice, i call this modis: method of discovery

if i am learning something new i will log whatever i read or watch or listen to in the order in which i did in order to achieve the level of expertise i currently possess

my goal is more of a possible vector of learning instead of thinking it 'the' way to learn something
The magic of unicode.
Just give him money. An entitled salesdude is a problem.
See if you can find a copy of silicon run: http://www.siliconrun.com/sr_lite.shtml
OP here. Sorry for the code-golfy post on HN. But, some clarifications:

1. Yes, it is O(n!) - it says so in the description but not on the title of the post on HN.

2. It is 4 lines of code for `nQueen` function. I did not include the printing code in the line count.

3. And no, I did not cheat by using semicolons in same lines - these are 4 legit lines IMO. You can put the `&` clause in 1 line to reduce it further.
Any single birth control mechanism can fail, but that never means you're forced to bear a child if you don't want it.
>> In terms of usability, the watch has proven a tough sell. US presidential hopeful and die-hard Apple fan Jeb Bush didn’t even know his Apple Watch could make and receive calls. <<

With arguments like this, I wonder why this article is on HN :)
Hackers drive huge global IoT security market growth
I started listening to "podcasts" or what were once called "webcasts" or "netcasts" in the mid-90s with Pseudo [0] and the like.

0: https://en.wikipedia.org/wiki/Pseudo.com
I've been swimming with my AppleWatch from day one.
Όλα για όλα για την κορυφή
Python 3's `yield from` lets you write that in one statement:

def n_queens(n):
yield from (p for p in permutations(range(n))
if len({c + i for i, c in enumerate(p)}) ==
len({c - i for i, c in enumerate(p)}) == n)

It also illustrates how much neater list comprehensions can be in Python versus map/filter since its lambda functions are fairly verbose (even though there's a straightforward correspondence between them):

def n_queens(n):
return filter(lambda p:
len(set(map(lambda x: x[1] + x[0], enumerate(p)))) ==
len(set(map(lambda x: x[1] - x[0], enumerate(p)))) == n,
permutations(range(n)))
Here are reasons why I still wear a watch:
I regularly have to visit places where personal electronics are not allowed, but I still need to keep track of what time it is.

But more importantly I wear watches because I enjoy wearing them. I enjoy choosing my watch based on what else I'm wearing that day. It's an accessory and fashion choice.
Of course he didn't.
It seems the process isn't especially profitable, but it exists: http://www.sciencedirect.com/science/article/pii/S2214993714...

I don't see any reason to say the batteries damage the environment.
How i can uses my subscriptions channels on my montize YouTube channel?
And I consider the title of the article almost as the confirmation that the Apple Watch is OK. Note how carefully it is worded. It's certainly not "it's clear nobody buys." It's not "nobody will buy." It's "no one needs."

Even before the Apple Watch no one who had a smartphone "needed" a watch.
The Birth of JavaScript: How and Why?
Interesting, didnt know why I felt like shit on a 380 after a 12h flight. Had a terrible headache and a sore throat. Is sitting at the first floor even worse? It was also very cold but not sure if related. Boeing felt a bit different (better) over the same distance but I thought it was just me
Sure, but I'd like a filesystem/os where that's not possible; where I have the control to prevent such an activity. I have music, videos, and photos which should hardly every change. So it would be good to be able to make those read only, and in the rare event I want to tweak the photos, or edit the mp3 tags, I'd allow, say, one change per file in the next n mins. I'd like there to be an original version of each file which is never deleted, so i'd have version 1,2,3,4,5 normally, and if something tries to trash it then i'd have version 1,203,204,205,206 where something has tried (but failed) to overwrite the original one by changing it 200 times or whatever.

I'm not saying that the answer is to use an existing versioned os; I'm saying that filesystems/oses need to keep up with the demands users are making on this. Ransomware is a newer problem than viruses, users deleting files by mistake and power failure during writes; it's going to need a bit of thought and development to solve, but it seems obvious to me that this is solvable, and it should be easier to solve than, say, spam or ddos because it's somewhere where the OS should have complete control over what's being stored. At some point, the ransomware is attempting to remove the current version of something, and it's not beyond the wit of man to detect and prevent this.
I started the Intro to financial accounting today - which prompted me to ask this question.
I don't like that categorization. If a company bubbles to $7 billion, then recedes to only a half billion at which it keeps a steady business, that doesn't seem like it should be called s flameout, even though it failed to maintain its bubbly valuation.
It's not really so much friction as collision, which in post-classical terms is objects coming close enough together for (mainly electromagnetic) quantum interactions to dominate.

The objects around a black hole are on different intersecting geodesics; "collisions" result in energy exchanges that boost the particles onto different geodesics, typically that wind closer to the horizon.

Near the horizon inverse Compton scattering becomes important, too: high energy photons emitted by matter-matter collisions end up colliding with charged massive particles with a transfer of momentum from the latter to the photon. The latter's change of momentum leaves it on a geodesic still closer to the horizon, while the photon is boosted to high energy (perhaps escaping to infinity as an X-Ray).
This is hilarious Hitler uses Docker
Agreed on noise fatigue. Good -30dB earplugs (worn under headphones if nec), even while sleeping, make me land much better rested (and are ~$0).

Doesn't help with jetlag itself (I.e. the mismatch btw astronomic and biological time), but still a big deal.
You're right - I had to dig around to find it (on the Android app). It's nowhere near as clear as it is in Facebook Messenger. (And of course there's no `read to here`).