skysight-inc/HackerNews huggingface dataset:
I've compiled a small list of consumer-oriented neurotech startups. Let me know if I'm missing any:

https://choosemuse.com/

https://www.emotiv.com/

https://www.next-mind.com/

https://www.brainco.tech/

https://neurosity.co/

https://www.neurable.com/

https://www.neuralink.com/
Is is safe to invest in bitcoin now?
A self-cooling can is a luxury product but canned drinks are not.

It either needs to be super cheap or you need to somehow sell it in the high end luxury segment or else it's unlikely to make money. (I think).
It will be interesting. The amount of fiat money being created right now is a bit crazy. Whether that is "good for Bitcoin" is not entirely clear. Bitcoin has failed to live up to initial hopes. Transaction fees are too high and throughput (transactions per second) is too low. In a way, it is victim of its own success, at least in terms of price per coin. The second layer protocols, like Lighting, were supposed to solve the fee and throughput problems. I've played with Lighting and when it works, it is amazing. However, it far from a simple and polished user experience. Maybe they will eventually get there. Or, maybe people will give up waiting.
It's Http Archive(HAR) recorder+indexer not a scree capture/mp4 video recorder program. You can use it with your webbrowser, you don't need an app. You can self-host the instance as well.
If you didn't draw it in a log scale, you wouldn't see the patterns when they occurred in the lower levels since the size of the later movements would dominate the graph.

Basically it is a way to show that there is similar movements in the value even when the ranges they move in are completely in different scales.
to what purpose ?
I've worked with all the various Arduino and other MCU boards as well as Pis. My preferred chip is still an Arduino Nano in a screw terminal carrier (just today I wired up one to make a rotating stepper that rotated in sync with a camera trigger, to do 3D scanning for Meshroom).

I love the old Uno, it's solid as a rock but of course has very limited CPU and memory. I would only use an Uno if I had a specific shield that fit the Uno and needed 100% compatibility. The dupont connectors are too loose for permanent projets that get shaken around... it's 5V, which makes working with some hardware easier (although most things "kinda work" with 3.3v MCUs, some stuff doesn't).

The Nano is like the UNO but smaller, although you can get nice little screw terminal carriers that make permanent connections more reliable.

The Teensy is a faster arduino with some very good support libraries. It Just Works, most of the time. But I haven't ended up using it for anything; I've replaced it with Nanos or ESP8266 or ESP32.

The ESP2866 and ESP32 are great systems, truly amazing what they can do even if they're just emulating an Arduino. however, there is a fair amount of compatibility problems with the 32 (for example, I have a sketch for a self-balancing robot, it works fine on Nano and ESP2866, but hangs on the '32). But the 32 has a special trick up its sleeve: the arduino functionality is really just an emulator that runs inside an RTOS. I started to play with FreeRTOS on ESP32 (https://docs.espressif.com/projects/esp-idf/en/latest/esp32/...) and was really impressed. It feels a lot like my days using a 286- no virtual memory, a few megs of RAM, and basic networking.
I bought a coffee beverage in a self-heating can at Walmart... La Colombe I think. It was pretty good and nice and hot. It was a couple of bucks I think.
Given the ultra-speculative and very volatile nature of bitcoin so far, aren't these models effectively numerology? I really fail to see how you can reasonably tie bitcoin's rate of production with its price.

After all the last halving was in July 9 2016. Since then the production has been reasonably constant while the price has been a complete rollercoaster.

With logarithmic scales and big enough error bars you can fit anything into anything.

>If you're wondering why your friends who are into cryptocurrency are in a tizzy

Being into cryptocurrency is reason enough to be honest.
Sometimes if you are number one, you still can't afford shenanigans.
Could it be that you were using type-aware linting rules? If you have these rules enabled, ESLint basically has to compile all your TS files to check if the rules are followed. Note that most of the ESLint rules are _not_ type aware, but following the setup guides quickly has you turning them on “by accident”. For more details, see: https://github.com/typescript-eslint/typescript-eslint/blob/...
Oh yes, I embrace the distinction you're drawing, I tried to make the same point about "magnificent" Minsky Machines and FRACTRAN programs.

They aren't just "computationally equivalent," they're equivalent "all the way down."
No one puts a gun to anyone's head to use it. There are many stablecoins now, with various properties. USDC trades at the same value as USDT https://www.circle.com/en/usdc

Traders value Bitcoin the same in USDT or USDC, and USDT / USDC trades at parity. That implies the market trusts USDT. It doesn't matter what people on HN say, as long as the market agrees.
It's not just proximity to the office. They could commute from some distant suburbs. But young people who chose to work in London or New York also often want to experience the cosmopolitan life of a major city.
Interview Questions for Full-Stack, Web Developers
Developers serve their clients and employers. In the best situations, serving the user aligns with that.
Why was the decay curve implemented ad catastrophic halving instead of 10%/yr or adaptive like the block creation rate?
Oil value is based on supply and demand. Bitcoin value is purely arbitrary.
I assume because in its short history, the bitcoin price has spanned many orders of magnitude
To answer the frequent question about Teensy.

Paul. Paul is the reason to buy a Teensy.

His dedication and support is inspiring. Phenomenal.
Your numbers are close but I'm not sure where you found them. The subsidy went from 12.5 to 6.25. It started at 50, and it's reduced by a right bit shift ("the halving") every 210k blocks:

https://github.com/bitcoin/bitcoin/blob/0.19/src/validation....
> Sadly the reality was also like a TIBCO type approach around data-pipelines.

Thats exactly how it looks like, thanks for confirming. Will avoid.
"Substantial", maybe. I don't recall any major papers this year about efficiency in NeurIPS, ICLR, etc.

Nevertheless I think my point on "the wider Deep Learning community" not focusing on efficiency is correct.
Tutanota launches MTA-STS support for custom domains with Let's Encrypt
The issue with a deflationary money is that it reduce exchange rate (you try to hog as much as you can), thus reducing GPD. That's an issue for everyday money (and why the dollar was decorellated from gold).

I think the blockchain is a good idea, even as a simple money ledger, but the scarcity BTC holders praise is an inherent issue that will make bitcoin less and less usefull as a currency, and while the price will probably stay high for the foreseeable futur, i think BTC won't ever be adopted by institutions, at least not long-term.

Other cryptocurrency that don't have the deflationary issue might be adopted officially though though (but, the future is uncertain)
Importantly, with the reward being cut in half, difficulty should go down.
I guess we need to know the total number of cases to figure out what the deaths mean, and until everyone has gotten an antibody test, we can't know that total number.

To make the numbers work for the "weird cold" in early February case, I guess we have to work backwards. Assume that when we went into lockdown was the actual peak, 8 million people in New York City had COVID-19. That means that there is one death for every 500 cases. Then we have to pick a reproduction rate, which I have no idea how to pick, so I'll say that it increases by 1.5x every day (so on day one you have x cases, then on day 2 you have x + 1.5x, then on day 3 you have x + 1.5x + (1.5)^2x, etc. Going back a month from March 20 (which is approximately 30 days, and when a lot of people report their "weird cold"), that would mean we'd expect around 8 million / 383500 = 20 cases on Feb. 20. With 1 death per 500 cases, you'd have 0 deaths at that level.

I know I've pulled these numbers out of my nether region and so they are likely very wrong. But with some back-of-the-envelope math, I think we can have some sick people in February without a lot of deaths.

Obviously my 8 million total cases in NYC number is too high, and the 20 cases on 2/20 is too low for me and my friends to be those cases. But that exponential can be tweaked to make something plausible. If we make it 1.2 instead of 1.5, then we should have had about 7000 cases on 2/20, and that means around 14 deaths. That seems quite plausible to me. So I dunno. There was a weird cold. It's weird. It could mean anything.

I signed up to get an antibody test. 1 test is not data, but it will be very interesting to see the results.
Genuine question: where does this fall with regards to GDPR? If you aggregate data about a European, don’t you technically need to ask them for permission first?
I'm out of my depth now, but wouldn't this have the same issues in a rotating frame of reference? Surely, if position/direction is conflated, then rotation is too, no?

Or am I way off base?
The 'ore' has half as much in it.

It makes mining less rewarding. It's not ½ because miners also get transaction fees.
Intel Confirms Critical New Security Problem for Windows Users
Does this suggest that transaction demand severely lags the inventor's assumptions when building the coin parameters?
What issues have you encountered that make it not great for large apps?
My initial thought would be expensive beers, but most of what is popular today (IPAs) should be continuously refrigerated from brewery to glass.
Uhm, I wonder how would people from this village comment on it https://en.wikipedia.org/wiki/Fucking,_Austria
Or maybe a black banner? $FAMOUS_COMPANY was just murdered.
Shadesmar – Fast C++ IPC using shared memory
Seconded, it ain't pretty but it's powerful.
Actually, I think this was meant as a reference to Twitch's experiences with the Go garbage collector:

https://blog.twitch.tv/en/2019/04/10/go-memory-ballast-how-i...
Why are these "promises" not drawn up as contracts, so the city can sue when they aren't met?

Edit:

> Under these so-called enterprise zone agreements, delinquent companies can face penalties, including repayment of taxes and the termination of incentives. But in Youngstown, they rarely do. Officials have canceled 25 agreements over the past three decades, usually the result of the business closing, relocating or failing to move forward with a project. Records indicate that the city sought back taxes from an errant firm on just one occasion, although it’s unclear if authorities ever collected; city officials did not respond to questions on the matter. As a result, dozens of private businesses have profited from public subsidies in a city that can scarcely afford them.

Unclear what the reason is

Edit 2:

> Now, Youngstown’s approach to economic development is coming under greater scrutiny as the city’s former finance director and a prominent developer prepare to face trial on public corruption charges. At the heart of the case are allegations that officials steered taxpayer funds to favored projects in exchange for bribes.

Ah. Yep.
I use USD-C and DAI to give out grants to a team of international volunteers. Could not get payments to a guy in Turkey through venmo, paypal, square cash, or transferwise. Now we just send everything via stablecoins.
"Mining" is a brute force search for a solution to a cryptographic math problem. The difficulty of that math problem is adjusted so a solution is found about once every ten minutes.

Whomever solves it get's a reward + whatever transaction fees happened since the last solution. That reward was initially 50 BTC, it has halved 4 times now, 50,25,12.5, now 6.25.

Something like a lottery that gets drawn every ten minutes, but instead of somebody rewarding you, you just have to show the network that you found the solution.

After the halving, the reward per round is... well cut in half.

This affects mining profitability. Puts lots of hardware in locations at negative profitability so they'll have to shut down and buy new hardware, find cheaper electricity, etc.

Whatever happens, difficulty will be adjusted so the same 10ish minute block reward time is maintained.

What does this do to value? Eh, the bitcoin market isn't very rational or consistent. Miners will have less to sell, certainly, but people will have all sorts of ideas of what it will do to the price of bitcoin and since so much of bitcoin is speculation and so little is using it for any real transactional purpose, who knows?
https://github.com/typescript-eslint/typescript-eslint/blob/...
you're working with the assumption that it's a commodity. It's more like a currency than a commodity.

also, is the price of gold for example really tracking the cost of producing it?
I also signed up for the test. Should be interesting.
On RSpec, Minitest, and Doing Magic Right
Slack now strips location data from images
Rational market - that's an oxymoron if I ever heard one.

Yes, current prices include anticipated future events (or at least speculation on those events, as well as anticipated behavior of market participants based on those events, yada yada), to an extent. What prices can't anticipate is the behavior of market participants at any point in the future, much of which will be irrational; or the events in future history that may or may not trigger that behavior.

Yes, there is alpha to be gained based on data collection/processing -- things like news, weather, twitter, satellite images of traffic or parking lots, etc. The more you know and can effectively analyze that other market participants don't know or can't effectively analyze, the better. But no one really knows the future, only what traders are statistically likely to do in the near future based on current events.
Exactly! Everyone knows that $HYPED_TECH is just reinventing the wheel that $OLD_TECH already invented, and back in those days we were handling hundreds of $MULTIPLES of users a $TIME_UNIT on a single machine with only 64 ${SI_PREFIX}bytes of RAM over a dial-up connection.
Ha .. I miss those days and have been curious what was different. I have chalked it to youth but maybe you have a point. Opening up gaming magazines was an experience that poems should be written about. I remember old magazines on Amiga and even Nintendo Power that I'd keep in my bedroom as some of my most hallowed possessions.
rational market

Perhaps this is glib, but it's worth remembering that bitcoin isn't a rational market. At no point in its history has the market reacted rationally to any event.

It only appears rational in hindsight, if at all. But "rational" implies a causal link between an explanation and a subsequent event. Those explanations almost never turn out to be true.
But halvening happens on a fixed schedule, so all future halvenings are already priced in the value of Bitcoin in national currency. So if you get half the bitcoins for mining, ceteris paribus you are getting half the dollars.
for all the sceptics here, a good intro to bitcoin and money[1]

https://medium.com/@vijayboyapati/the-bullish-case-for-bitco...
Uranium, selected from the finest natural ore, carefully enriched, is vegan too. :)
The prototype initially used HFC-134a. Opening one violated EPA regulations!

https://www.popsci.com/gadgets/article/2012-06/first-ever-se...
company i am consulting switched from php stack to client side react. killing search traffic and botching evey other metric they had. inlcuding revenue.

there is a german word for this fallacy: “Technologieglaeubigkeit”: the belief that with modern technology you automatically make a the right decision.
Enjoyed the article. This theme has been on my mind, since I was recently discussing the “blub paradox” with friends. I think that the general idea of the blub paradox (not just limited to programming languages) is rooted in the avoidance of discomfort, which thereby cuts off opportunities for gaining new and deeper perspectives.
Building Kubernetes CICD Pipeline with GitHub Actions, ArgoCD and Reliza Hub
Oh, that one's just on a longer cycle. It's not just a HN thing; the entire Internet collectively rediscovers polyphasic sleep every five or ten years.
How to Keep a Work Journal to Stay Highly Productive (With Template)
Here I explain how you can use a work journal in a brief video using NotePlan.

Let me know what you think!
So my assumptions in the original question a number of comments above (in the context of the comment above it) were:

- something running regular Linux would be too heavy (though I don't know if that's really the case, especially if you only turn it on a few times a day on average for a little bit)

- adding the "OS" abstraction would presumably result in access to higher quality ecosystem of libraries than whatever is available on bare metal directly (as I assume some of those libraries depend on the "OS" for event handling etc.) - which was the complaint in the comment I was replying to

But like I said, I know very little about this area, so if any of this doesn't make sense, just ignore my comment :D
tl;dr: this is not an "age reduction breakthrough", it is both A) a confirmation of what we already knew, which is that parabiosis makes old mice healthier, and B) a finding that virtually proves the mAge clock has nothing useful to say about lifespan

Parabiosis does not substantially extend lifespan (possibly not at all), based on the experiments done so far. Even if it did, it definitely does not double it, which is what would be predicted by naively looking at the halved DNA mAge on the clock.

This paper is very likely intended as another validation of Horvath's mAge clock. The clock shows that there is a strong association between epigenetic state and both chronological age and morbidity risk. Exactly why that is, and what it means, is highly controversial.

Mainstream aging field does not really care about lifespan much anymore. Increasing amount of focus is on so-called "healthspan" - approximately the duration of healthy life, or incidence of morbidity. You would think that you could not affect one without the other, but in fact you can, to a frustrating and surprising degree.

Therefore when you read about "rejuvenation", we are increasingly finding that you can find treatments which improve a broad spectrum of unrelated health markers, that these treatments will affect epigenetic loci predictive of age, and all of this without any substantial effect on lifespan. (From a public policy perspective, this is considered highly desirable, as for public expenditures it would be ideal if people lived perfectly healthy until the moment they keel over, even if we cannot extend the time until they do)

One possibility to keep in mind is that rodents die almost entirely of cancer. So it is possible that some treatment which improves "everything except cancer" would not show any lifespan effect in rodents. This would be one way of reconciling this paper with Horvath's earlier finding that the clock predicts all-cause mortality in humans.
Isn't it a myth that fees are too high? $0.05 seems to get you in and verified within an hour, if I remember correctly.
how can We buyers be sure you will deliver the project? What is your experience? what device you previously delivered? there was a lot of kickstarter cool things that deliver poorly
This is an ignorant question, but maybe someone can finally explain this to me...

"So-called bitcoin miners expend tremendous amounts of computing power to verify transactions and link them"

If this is true, shouldn't the ability to mine be limited by the computational resources needed to perform these tasks? Instead, it seems people increase computing power with no apparent limit in order to mine, and the "demand" for that power is never met.
Frankly it's really strange to hear on the one hand:

1. ...that "the feds are debasing our currency through their relentless printing"

It is producing a measured, consistent, relatively small 2% rate of inflation over decades and decades. They are of course acting on behalf of an elected body, and ultimately accountable to that body. They're also audited.

2. ...that Tether's relentless, un-audited, 70%-at-most backed printing is fine because the "market trusts it" and "nobody's forcing you to use it."

The market trusts it because number go up, and it's in the interest of exactly zero market participants to show the world the emperor has no clothes.

It's also not fair to say that "nobody's forced to use it" when everyone is forced to use it. In 2018, 80% of all crypto exchange transactions were conducted in Tether. That makes USD transactions by far the minority. Since arbitrage bots keep the prices in sync, and the majority is USDT, even the USD exchanges follow the USDT prices so long as there exists sufficient liquidity to balance the books. [1]

[1] https://www.wsj.com/articles/the-mystery-behind-tether-the-c...
Someone found it interesting, I guess. :) Personally, I'm finding the discussion very interesting, since I haven't seen it here before.

Sometimes Wikipedia articles hit the front page. It's fine. Usually.
The idea of there being separate spaces of all kinds for executives is pretty common in larger companies. How how and where they spend their time in those spaces is usually just up to them.

One company I worked at was acquired and the whole executive 4th floor was empty. Only a handful of people knew that floor had been left unlocked. For a good year it was a glorious place to take a lunch break and use the bathroom.
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Very nice work! Unfortunately it appears Snap.svg has been sunsetted and has not been updated for a few years.
From the spec (8gb) it appears that NiFi was not needed. Were you co- locating zookeeper on the same nodes?

Also you say it needed to be run periodically? It’s supposed to be a long running service. If you need something that you can spin up and shutdown in a container or VM then it is probably not the solution.

Use it if you have high volumes of data you need to transport from A -> B. We run on a cluster with 256gb ram, 128 core per a node.
Lord Sumption on the UK Government's Lockdown
Ask HN: Blackhat SEO Spam
What to do about blackhat SEO spam?
I just found out that there is a way to produce them not to expensive, but it's also not very effective wrt. cooling. Given that as far as I know people in the US tend to drink their soda quite cold it still not likely to work. (IMHO)
A catchy intro is nice tho.