skysight-inc/HackerNews huggingface dataset:
RT cores are different because raytracing wants AoS (array of structures) rather than SoA (structure of arrays).

Let's look at the ALU perspective. Normal shader cores are essentially SoA: all ALU operations operate on 32 (NVidia) or 64 (AMD) items / threads at a time.

Implementing a ray-box intersection requires 6 multiply-adds to determine the intersection-time of the ray with each box plane, plus a bunch of comparisons to determine whether and when you hit the box. So if you're walking a standard (binary) BVH, you need 12+x ALU instructions (roughly equal to cycles) to handle one step of a wave / warp.

The picture is still fairly rosy when you start out your BVH walk, but then you get ray divergence. Some of your rays may finish early, some rays may want to do ray-triangle intersection instead. This means that only some of the SIMD lanes will be active and your ALU utilization drops. You're using the same number of cycles, but get much lower bang / buck.

In a dedicated RT core, you can operate one ray at a time instead of one instruction at a time. So you can do all multiply-adds for intersecting a single ray with both boxes in your BVH node in a single cycle, and then follow up with the comparisons in the remainder of your pipeline.

The upshot is that when rays diverge, you can still fully utilize the ALU units in your ray-box intersection pipeline -- it simply takes you fewer cycles to process all rays in a warp.

A similar argument applies to the memory system as well -- due to ray divergence, you obviously want to store your BVH nodes as AoS. A BVH node requires 12 floats to store the dimensions of two boxes, plus some space for child node links, which makes 64 bytes a natural node structure size, and you want to keep it contiguously in memory so that loading one node means loading (part of) one cacheline. But this makes it difficult to get the data through a normal shader core's load unit, which is optimized for SoA.
That does assume near perfect efficiency for the redistributed volume. Presumably working around the physical limitations of the where the jack needs to be versus all the other components, efficiency would not be so great.

But anyway who are we kidding? It’s not about making space in the device in the end. Perhaps that’s the straw that broke the camels back, but not what set Apple off in this direction to begin with.
> For example, I didn't see a single mention of "...so we're going to go organic..."

Going organic is nearly a decade long process during which time you are paid regular market price while having to burden the added cost of organic processes. If you have the millions to get going it can be a good deal long-term, but a farmer who is already struggling is going to be broke long before they ever meet certification.
The fact that so many people on HN, people who should know the best how malicious this company and their business model is, are still using FB is worrying. How are normal people supposed to quit?
That would just be a short term thing, though. If the price stays that way, some farmers will exit the market, thereby increasing the price.
get an iphone 5 or se and charge while using headphones to heart's content.
try the iphone 5 or SE
Just a year ago, a remote execution vulnerability was discovered in bluetooth stacks across major OSes: https://www.theregister.co.uk/2017/09/12/bluetooth_bugs_bede...

> "Just having Bluetooth on puts you at risk," said Izrael.
I have been a member of the Boulder group for over a year and the sponsorship is relatively new. Before then there was no website, just an email list, and lunch was just pay as you go (which, with 15 people, was a bit of a pain when we got the check).

As far as I can tell, the influence of the sponsor is limited to a thank you at lunch and a shout out on the website. But I understand your concern about the tension. This is something that every volunteer organization or meetup group struggles with:

1. It usually costs money to put on an event worth going to. Not a ton, but food, beverages and space aren't free.

2. People prefer free (and tech people tend to expect free).

I know another meetup that struggled for years trying to solve this problem, and never found a satisfactory answer.

The answers I have seen work for groups are:

1. Find sponsors and thank them

2. Charge a membership fee

3. Only do free stuff (meet in the library, or a park)

4. Have the meetup organizer pay out of pocket (a different kind of sponsorship)

5. Be lucky enough to have already acquired some kind of income generation (typically an older established gepup like a fraternal order)

It's a tough problem.
Regarding 2', many groups of humans found ways to live in the most remote and barren places on earth (the Arctic regions, the Australian desert...) for up to 18000 years.
It's easier to move content to a new domain name than to a new legal identity.
Gal Gadot Top Ten List of Highest-Paid Hollywood Actress
Reactive Java all the way to the database with jasync-sql and javalin
The user usually has the option to require a pin be supplied to unlock the hardware token. The advantage to certificates on a hardware token is that they can't be stolen remotely unlike a user name and password which can be compromised on either the user end or service provider end.
Online Java Thread Dump Analyzer
>it requires a considerable amount of time in-ear to get them low, about 4+ hours

He he, I won't call that a long time, I would be OK with them if you don't need to recharge them for a week.
> There might be a minor distinction to be made between having a no interest in other cultures and having £1500 lying around to fly to London.

1500? Easily doable for 500/600 return with some planning.

I get those values when searching MIA-London in Google flights, doable with other cities as well
Getting started with Tmux
I guess it is because backdrop-filter is a new property. AFAIK backdrop-filter affects everything everything below it, so maybe a sanity check for the number of times the effect applies is missing.
They’d just be shooting themselves in the foot, because most ISPs in the US are local monopolies. Their customers wouldn’t be able to switch in order to get access to those services even if they had the will to.
This is a very generic article. I would say made up even. China has a ton of problems. Unfortunately most Hong Kong based analysts spend more time partying in Hong Kong than in southern China. If the west wants to have a long term chance against what is happening in China we really have to stop with this feel good journalism.
Avatar first products and platforms
Can anyone confirm if this is a denial-of-service attack (through memory exhaustion)?

I’m no security researcher but, as I understand, it shouldn’t be exploitable if this is the case.
Here the follow-up:

https://www.archij.com/improving-the-blog-security/
The point of the hardware token is that the credential never touches the PC. Putting a private key in local storage is no better than a user name and password because it leaves it open to theft. The most common problem that an everyday user faces is either a data breach on the service provider end or a virus / keylogger on their PC. Hardware tokens with certs solve both those problems in terms of account access.
Well Samsung phones with LineageOS[0] are more than decent.

[0]: https://wiki.lineageos.org/devices/
Ask HN: Tails OS
First time user of tails OS

Is it necessary to use a VPN app install in the instance of tails while it's running?

If yes. How do I get part there amnesia mode?

Newbie to Linux.
... and now he’s on this "all taxation is theft" stuff. Calling the government a thief. It’s so myopic... but we have people who take this stuff literally and they’re incredibly damaging to society.
Sounds like it was a social group were people enjoyed having some peers chatting with. Not a research group on cutting edge technology issues. Contentwise the real world can rarely compete with the internet...
San Francisco to London can easily run $2000 coach. That said, you're absolutely right! It's always possible to find a way to get around for much less than typical full price, and you are very correct to note this.

However, is it perhaps possible that the precise numbers might not be particularly relevant to the point? It's still at least an order of magnitude more than the cheap flight, for two major destination cities about as far apart and Detroit and Dallas.
I'm curious how havibg never been you find tg the numbers "laughable"? 7500/month is at the high end of the scale.
The RT and Tensor cores are primarily intended to power raytracing and DLSS, respectively. Both of those features will be used in conjunction with traditional shading/compute units, so the entire die is utilized at once, at least at a high level.

It would be really interesting to know the power consumption of a Turing card maxing out just its shading units, versus full utilization with RTX/DLSS.
Unbiased Forex Broker Reviews – Forex Scam and Best Forex Broker
Even if AIDS went away overnight, there would still be a whole range of other diseases spread particularly through male homosexual sex, IV drug use, and high-partner count or professional sex. I wonder at what point hepatitis actually becomes more of a problem in rich first world cities than HIV.
Keybase verification
[ my public key: https://keybase.io/kjw49419; my proof: https://keybase.io/kjw49419/sigs/xZDkSGqn661k5QOBDQevcCBl3UE9HRFyUpBtPOHk2Eg ]
And certificates for webpackages attest domain name, not legal identity, right?
I did my own some time ago, and it can do Kerr black holes, too ;) No accretion disks, though, but should be possible to implement.

https://github.com/fizyk20/gr-raytracer
Why growth can't be green
Low-Level Debugging of Stubborn Docker Containers
It actually isn’t that easy, like at all. A tiny DAC in a phone amplified to loudspeaker levels is going to sound qualitatively different from a stronger signal out of something built to that spec. Not to mention interference issues in analog signals at low power.
100% Clean and Renewable Wind, Water, and Sunlight All-Sector Energy Roadmaps
There are more heterosexuals with HIV than homosexuals.
Drive and Photos are data vacuums, these won't go away.
That is 4+ hours in-ear. What usually happens is that someone wants to talk to you throughout your day, and you put them in the case for 5-10 mins and you gain an hour. Or you eat lunch with co-workers and they go in the case for a bit. Then, after work, when the battery is dying, you need to take a shower, so you put them in the case for like 20 minutes and you have enough charge for the rest of the day; then you go to bed and they fully charge over night.

I charge my case about once a week.
WATCH: UK Muslims knock out woman who objected to their praying in the street
>You absolutely don't need a PhD to learn those things.

True. You can learn anything without a PhD. A PhD requirement reduces the cost to hire qualified people. Instead of having to pay to interview 1000 people to get 5 you can interview 20.

Companies recruit PhDs because they have amassed many techniques, and have modelling skills on average that are better than non-PhDs.

There's also quite a difference between seeing these topics in class, having been exposed to them, and being able to wield them at a fundamental level. This difference is also increased by having the rigor of a PhD program teach far more skills than a masters or undergrad teaches.

A good example is the Fourier transform. Many people have seen it and have a rough idea what it is. Very few of them truly understand it at a basic level and all it can do, it's generalizations, etc.

>covered in my Masters degree.

Bingo. The claim I was refuting above was that these things are rarely taught to undergrads.
I tend to use pari/gp, octave and gnuplot independently (and I am fairly proficient in all three). What would I gain by moving to Sage ?
>there would still be a whole range of other diseases spread particularly through male homosexual sex

Like what?
Mohammed Abusalih – Sugar Icumsa-45
Los Angeles Should Be Buried
Nokia 6.1 (Android ONE)

Blackberry KEY2 / KEY2 LE

Both have headphone jack, dual SIM (or SIM + micro SD) and monthly updates.

BB even has a keyboard!
Other rich people who got richer.
It's not a fundamental part of most cryptocurrencies: it suffices to have a private key be able to send and receive money from its own account, without knowing what legal entity controls that account.

It's not a fundamental part of Signal; the cryptosystem only identifies phone numbers, not legal identities. Similarly, it's not a fundamental part of Keybase, which only identifies social media accounts.

It's not a fundamental part of PGP; it's traditional to verify legal identity (and some users have a need for that), but it's not at all required and you can have a pseudonymous key in the strong set pretty easily.

It's not a fundamental part of military encryption, where the legal entity is just "this country's military," but internal distinctions matter.

It's not a fundamental part of Tor, which goes to lengths to lose track of the legal identity of its users.

There are advantages to identifying the legal entity that controls a website, sure, but 99% of the advantage of SSL is identifying a site name so that cookies are only sent to the same site, JavaScript is only accepted from the same site, a bookmark opens only the same site, a link from elsewhere on the web opens only the same site, etc. And in most cases, "legal entity" is just a proxy for "entity I expect". When I visit gmail.com, I'm looking for the entity I previously visited at gmail.com; knowing that gmail.com is now Alphabet instead of Google doesn't really help me, but knowing that it's the same site does. When I register an account in person at First Bank of Springfield and go home to log in, I care less that the website I find is controlled by one of the many First Banks of the many Springfields than that it is the same entity I just signed up for an account with - and I can guarantee that by typing in the https URL they gave me on the welcome brochure.
My rough calculation is that you get 165 mAh for every 1 cubic cm. A headphone jack will take approximately 1 cubic centimeter inside the case.

The iPhone X battery is rated for 2716 mAh.

So if you could use 100% of that volume efficiently for increasing battery volume, I think battery capacity increases approximately 6%.
Show a big fat dialog before changing your region: "After changing your payment method to a different country you will no longer be able to download the following movies: .... Would you like to download them before switching?"
Yes, sounds a lot like the "I think there is a world market for maybe five computers" prediction by IBM's president in 1943.

Practical quantum cryptography is actually not that far away IMHO as the theory is solid and there have been many successful test deployments in the field already.

Sure the equipment is specialized but not much more than e.g. the electronics that you need for a mobile baseband station or other specialized applications. You mostly need a good single-photon source and some high-quality optical components and there's no fundamental obstacle to producing those in large quantities and (eventually) for an affordable price. Also, high-quality fiber-optical cables are expensive but not prohibitively so, hence intra-city quantum links seem absolutely feasible and even inter-city connections are doable (and as you pointed out even satellite or line-of-sight communication is possible).

In my understanding the main issue that most cryptographers have with schemes like quantum key distribution is that they require classical cryptography in the bootstrapping process, so by their argument they can never be better than those classical schemes. They often forget to mention though that the adversary needs to be able to crack the classical cryptography during the key exchange process (i.e. within a few milliseconds to seconds), so the method is still much safer than any classical key exchange method except if you're facing a god-like adversary.
Facebook's AI Can Analyze Memes, but Can It Understand Them?
The whitepaper brings up physics simulation and occlusion/visibility testing as possible non-raytracing applications of the RT hardware, plus acoustic simulation as you said.

Page 30: https://www.nvidia.com/content/dam/en-zz/Solutions/design-vi...
You can make predictions, then test these based on observational data.

The case of the validation of the age of the Earth, something widely accepted as unknowable as late as 1900, and established to within 1% of its accepted value by the 1950s, is a case in point.

It is not possible to go back in time to measure the age of the Earth. It is possible to combine measurements and observations, of radioactive decay, of magnetic switching magnetic orientation in seafloor cores, of corresponding coastlines, of similar (or different) fossil records, of genetic drift noted DNA sequences, of rocks obtained from other bodies (including the Moon and Mars).

Naomi Oreskes has written of the development of plate tectonics from crackpot theory to the foundational concept of all Terrestrial geology, over fifty years, being formally accepted in 1965.

The discovery of helium, Dr. John Snow's Broad Street pump observations, validation of Einstein's space-time predictions through eclipse observations and GPS clock desynchronisation, of black holes, exoplanatary discoveries, use of Cephid variables to validated the expanding universe hypothesis, and measurement of gravity waves, would be examples of scientific experiments in the fields of astronomy,cosmology, epidemiology, and geology.

Economics needs to admit to falsifiability or stop considering itself a science.

The primary barrier to that latter is that special pleading allows economics to continue entertaining numerous highly-attractive falsehoods. Noteably: exemption to the laws of thermodynamics.

As well as lesser sins including an intentional ignorance of much of its own history and formative theory.

Disclaimer: Degreed in economics.
Hepatitis, especially correlated with HIV fear being reduced due to PReP, and decreased use of condoms.

I believe a lot of other STDs and diseases caused by STDs (anal cancer from HPV) are prevalent in certain communities at higher rates. It is a good argument for increased targeted education and health resources for those communities, both to help them and to reduce spread.
>I would rather argue that we can in fact do experiments in economics as well.

Fair enough. At least you're consistent. My point was that economics should be no less a science than astronomy.
>> "Buy" doesn't mean "host it for me online forever".
> Yes, it does!

No it doesn't. Buy means, it's yours, and in the future it will be still be yours. "Subscribe" or "Subscription" probably would be a more exact term. "Now it's yours but in the future who knows".
Huh, I got 3.5mm earphones and an adapter with my phone. Also, get AirPods. Unless you call for several hours uninterrupted every day, like somebody up thread claimed.
Seems to me like ray-traced rendering provides a feasible path to foveated rendering for VR, meaning much better performance for VR scenes at high resolutions. This would be a big deal for VR developers, since they don't have to do unlikely amounts of magic to implement this. If NVIDIA is able to drag everyone along, they will get the hardware for this without making any huge strategic moves on their own part.
>The compensation was 30% higher.

Then you weren't what most places call a quant. You were a programmer at a financial company with a toe in finance.

Did you use the math tools above or not? If you didn't how are you able to judge their efficacy?

>You're arguing in bad faith here so I'm done.

Convenient considering above you routinely did not address your claims, reversed positions, and discounted jobs on a quant site because the tech stack was aspx.

I figured your position may have been borne from not knowing the other side and from career sour grapes.
Mentioned in TFA FWIW.
Wireless is a terrible thing to base the future on. With wired you don't have to worry about interference or the fact that anyone with the right antenna can send/receive wireless. Of course it isn't always practical to use wired, but I think the majority of connection use cases work perfectly fine with a cable, don't need to be made wireless, and are in fact made worse by the usage of wireless.

You're trusting/hoping that [0] will never happen, or (for WiFi) that [1] will never happen. At least with most Internet usage there are additional layers involved that have their own security which can protect your in flight data, but the firmware on BT/WiFi chipsets doesn't necessarily have that sort of layered security.

I'd call it a dangerous goal.

[0] https://www.theverge.com/2017/9/12/16294904/bluetooth-hack-e...

[1] https://www.krackattacks.com/
I’m using my experience living in Beijing as a basis where Shenzhen is known to be more expensive than Beijing when it comes to rent.

I guess you could go lower end, something much more decrepit should be 3-5k/month (think pre boom apartment buildings). However, this would chip away at ones sanity and I don’t recommend it for a westerner. Also, most of SZ’s housing stock is much newer in Beijing, so you won’t find that low end as accessible. Instead you probably have to move way out into the suburbs to find rent that cheap.
Please discuss rational allocation vis-a-vis the Rule of Capture.
Copy that. I had to hard reset. (No crash while using Firefox, Chrome & Vivaldi).
What do you mean by „have a chance“?
The article is very clear:

Apple’s business model doesn’t rely on monetizing user data. Google, on the other hand, has a business model built around advertisers.

In other words, Apple has a choice when it comes to selling your data, Google doesn’t.

I’m not going to talk about Facebook because it’s just a website, like MySpace, and doesn’t sell hardware.
It’s both a lot of money and also much less. I find it important / useful for myself to put it into context.

For me the takeaway is that I went and calculated how many times richer than the average and therefore what my share of $0.5 per person would be. It still wasn’t a lot. And probably more affordable to me than the person at the middle of the income scale even then.

But yes! I see the “what about all the other things” element too.
It also reduces the bill of materials (cheaper and easier manufacturing), saves a decent chunk of space inside a very compact electronics device, and greatly improves ease of maintaining water resistance.

Not saying I like the trend, just that it does make sense even if you don’t sell wireless headphones too.
On internet censorship, China can tell the US: told you so
Interview with Dr Erika Camacho on the Hartman-Grobman theorem [audio]
Trying randomly for Detroit to Dallas vs Detroit to London on Oct 1 it was £51 vs £133 single. The London routing involved changing in Reykjavik though.
Karl Marx: "Wealth, as Mr Hobbes says, is power."

https://www.bartleby.com/10/105.html
Small town personal tax agencies aren't financially competitive with Deloitte either. Doesn't make them abusive if Deloitte tier accountants choose to work for them.

Every industry has small low income employers and big titans with deep pockets. The big take most of the high quality talent by offering high salaries, and the small compete for the scraps with niche offerings.

Only in software does being the former seem to be some moral crime. Like if you're not as good as a place to work at as google you're meant to put "we're fairly shit. B- tier candidates at best please" on your hiring page.