skysight-inc/HackerNews huggingface dataset:
This just sounds so crazy complex. It requires completely changing existing infrastructure. A lot more energy moving around (and that is not efficient).

If actually cared about efficiently transferring to fight climate change, and not build a utopia. We would simply create a list of all coal power stations, order them by age and then start building a nuclear plant right next to one after the other as fast as possible.

If you did it that way, you could in less then 20 years basically make your grid green. Most people wouldn't notice anything what so ever. No new infrastructure would need to be build. It would be reliable in basically all situations. And it would give you a very large base of highly educated engineers and technicians.

Compare that to just importing tons of PV from China and putting up tons of new transition lines.

> but there are readily available seasonal storage choices

Are there? Non have been deployed and if you look at modeling these need to be essentially free to actually happen.

> Iron-air looks economically viable

One startup claims this, they have not shown a prototype or given specs, it will not be commercially deployed for a few years. Its a bit early to claim its viable.

Fact is, storage beyond 2h is totally unproven. Most companies that have worked in this direction have failed.

> Electrolysed hydrogen, either stored directly or as ammonia. Just need PV prices to fall a bit, which is expected, and the cost of electrolysis to fall, which is happening.

Using direct heat is simply a better option then electrolysis on large scale. With advanced nuclear you can use nuclear heat to crack steam. Far better option.
"Sometimes"? Yup!

"Tedious"? Yup! Can use Dedekind cuts or maybe something called the normal completion, and especially the first is darned tedious!

There is a good math writer G. F. Simmons, of
Introduction to Topology and Modern Analysis, who stated that the two pillars of analysis were linearity and continuity -- nice remark. He also stated that really to understand, have to chew on all the arguments, etc. or some such.

Then I decided to study the proofs really carefully, so to "chew", and in hopes of finding techniques I could use elsewhere. When I mentioned that study technique, objective to my department Chair his remark was "There is no time." -- he also had a point.

Commonly there is an intuitive explanation of what is going on and some views that can provide motivation to study the stuff at all.

There are a lot of books and papers. As a student, I saw a lot of the books, got copies of some of them, put them on my TODO reading list, etc. Eventually, after falling far enough behind on the list, I wondered just where all those books were coming from? It dawned on me, profs need to publish so they do. They are also supposed to have grad students and do. Then the grad students take the advanced course by their major prof and end up with a big pile of notes. Then the grad student, as an assistant prof, wants to publish so cleans up the pile of notes and contacts the usual publishers to publish a book. The top university libraries are essentially required to buy the books, so they get published and bought. And, then, often, there the books sit, gathering dust. I won't say that writing those books was a total waste, and I won't say that students should spend more time reading those books. Or, the books are there on the shelves. They are not really difficult to find. The books have work that was done. Maybe the work is useful now; maybe someday it will be useful; whatever, the work is done, the results found, and there in case they do become useful.

In the meanwhile, back to the mainline of math education, research, applications, usually there can be some helpful intuitive explanations and motivating example applications!

Apparently some authors just give up and assume that their books will mostly just gather dust. But once I wrote Paul Halmos, likely my favorite author, and got back a nice letter from him with "It warms the heart of an author actually to be read, and clearly understood, by ordinary humans." -- at the time I had no academic affiliation and was just reading his book on my own. So, Halmos was surprised that an ordinary human would be reading and understanding his book.

Ah, in what I wrote, I left out that also in linear algebra in n dimensional space, the Pythagorean theorem still holds, that is, an n dimensional version holds!
You can buy a Toyota with corn in Brazil
Side thought: if you had a little buddy drone you tossed into the water (torpedo type) talked to your surfboard, that would be neat.
This is assuming that everybody has an interest in cybersecurity. I can come up with equally well known (in specific circles) tools that you may not have heard of.
That does sound very much like what I want!

I’m somewhat surprised that I hadn’t heard of the ni scheme before tonight.

Is there some nice software (can be cmd only, but ideally multi-platform) to do that where both parties are on separate residential connections, and where the receiving party side software automatically checks that the received data matches the hash?

Because if so, that seems to serve exactly the purpose I’m thinking of!

Thank you for the direction
Maybe off topic, but solving problems is a fraction of the joy I get from programming.

Expression and personal power over reality are where I get the joy.

A painter can create world and share a feeling. An author can manifests a memory. A musician can transmit a human experience without language.

Human imaginings about magic are immemorial.

Math describes reality. Math also can describe an extrapolation further.

Programming can manifest from the descriptive language of math into the real. It can use it as a pigment for a new kind of picture. Programming helps with everything below, and it enables new things slightly above.

By "above" I mean the layers of abstraction. A programmer isn't an painter, but a programmer/painter has an additional axis of art.

Programming is our species apex of material transcendence. I don't believe it's the top of the pile, but I have no conception for what's above. Its capacity for encapsulation seems to grow as the dreams do.

Programming grows to predict, programming grows to create. Everything is just a new library, a new framework, a new environment. How long before its limits are found, so we can find the next epiphanies?
Using imperative mood for normative direction and indicative mood for description of fact that isn't directive is just standard English.
They are still popular for multiplayer games that has a synced game state. In all clients you want to get exact same results when they run same code which is not possible with fp
How do you deal with the transitiob from MacOS to PopOs? I'm trying to do it, but discouraged from all the small annoying things:

- changing default shortcuts from CMD to CTRL. Is swapping the positions enough?

- Janky scrolling/no inertia ( i'm not on a framework (hp x360 spectre), is the framework better?

- all the small tuning software i have (Karabiner for remapping, Amethyst for tiling, BitBar etc)

- is there a quick look equivalent on PopOs?
> First I’m not gonna gamble my money on taking profits away from different companies.

Now we're getting somewhere! A true story. A friend of mine was offered a job at a startup. He was offered a salary plus a percent of the profits. He said he didn't want to take any risk, and wanted a higher salary instead of the percent. He got it.

The company was successful, and was eventually sold. The employees who opted for profit sharing got a handsome bonuses. He did not. He was incensed.

Do you think his anger was justified?
Other products I can think of in that early 90s period included "Small Blue Planet" from Now What Software and "Virtual Museum", a tech demo CD-ROM from Apple that included a real-time rendered globe.
FWIU, EM backscatter can be used for e.g. gesture recognition, heartbeat detection, and metal detection.
https://en.wikipedia.org/wiki/Backscatter

Entropy of wave noises may or may not be the issue.

Edit: (NASA spinoff) "Radar Device Detects Heartbeats Trapped under Wreckage" https://spinoff.nasa.gov/Spinoff2018/ps_1.html

> The Edgewood, Maryland-based company is developing a line of such remote sensing devices to aid search and rescue teams, based on advanced radar technologies developed by NASA and refined for this purpose at the Agency’s Jet Propulsion Laboratory (JPL).

> NASA has long analyzed weak radio signals to identify slight physical movements, such as seismic activity seen from low-Earth orbit or minor alterations in a satellite’s path around another planet that might indicate gravity fluctuations, explains Jim Lux, JPL’s task manager for the FINDER project. However, to pick out such faint patterns in the data, these devices must cancel out huge amounts of noise. “The core technology here is measuring a small signal in the context of another larger signal that’s confusing you,” Lux says.

(FWIW, some branches may have helicopters with infrared that they can cost over for disaster relief.)
I have a desktop PC, and I have 2 SSD's in my laptop, and I used to dual boot ESXi and windows. Worked perfectly fine, just remotes into ESXi on my desktop at home.

Now I dual boot Manjaro and a small windows partition, and just use qemu for most of my basic VMS.
Climate change isn't actually a planetary existential threat, despite all the fear mongering you hear.

https://en.wikipedia.org/wiki/Economic_impacts_of_climate_ch... and the more alarmist https://www.weforum.org/agenda/2021/06/impact-climate-change... say that the global economic impact of climate change will likely amount to about 10% of world GDP, and perhaps as much as 20%.

Those are huge, huge numbers! But to put them in perspective, it's less than the difference between living in, say, present day US vs present day UK. Big impact, but hardly planetarily existential.

And, yes, there's more to live than economics. But if life goes on normally enough that we can even not only still talk about GDP with any meaning, but even say that we are going to preserve 80% to 90% of GDP, things won't be too apocalyptic.

Keep in mind that this is 80% of a far larger pie than today, since normal economic growth will continue.
If yoU were a teenager at the right time, the L0pht, et al. were crUcial in nUdging the next decades of yoUr life.

I'm sUre I'm not alone in having fond memories seeing this. :)

PS: (2 decades since Boston madness!)
Hopefully not exclusively on their marketplace?
why waste everyone's time before having something worth sharing? you are ruining your reputation before you even start, associating your name with bad quality.
I think Zig is great and I'm following it with interest. But I think people should be aware that it is not really stable yet, at least in my experience from trying it earlier this year.

I ran into a compiler crash: https://github.com/ziglang/zig/issues/7865. I attempted to fix the compiler crash myself (https://github.com/ziglang/zig/pull/8372), and I found a fix that worked, but apparently it was not the right fix, and I was told the correct fix would be "quite hard" and "To fix some of the bugs you would need to rewrite quite a bit of code."

It sounds like a big milestone will be when Zig's stage1 compiler is self-hosting, written in Zig instead of in C++. I got the sense that the C++ code I was modifying is somewhat crufty, and the Zig version of it will be better designed in many ways (ie. https://github.com/ziglang/zig/issues/89#issuecomment-382110...), which will make fixing bugs like the one I encountered will be more tractable. I personally will be interested to revisit Zig when this migration occurs.

I also found that the language was changing from release to release in ways that made me update the code.

This is all totally reasonable for a language in development, and I mean no disrespect to the Zig devs -- it's an extremely interesting language. I only say this because stories I saw on HN gave me an impression that Zig was farther along than it is, at least in my experience.
Thanks!

(...wow that read head is tiny)
NYC's First Subway – A One Block Pneumatic Tunnel Below Broadway
Thank you. This is one of those interesting and obscure areas of history. Appreciate the link!
“fp” is an unfortunate abbreviation for floating point when contrasted with fixed point.
Know your target market.
IMHO what changed in 1995, was MS adding TCP/IP to Windows 95. Prior to that you had fight with dial-up, Trumpet Winsock, PPP and PPTP to get on the internet at all. Most normal people still couldn't do it without help, but it moved into the realm of possible.
Not for larger enterprises - simply because this is how they ALREADY do things. You setup new thing on new place, and 5 years later hope you can turn off version 1.

You would be surprised at how LITTLE updating and reconfiguring of systems that are working big enterprises want to do. And this is doubly so in the VPN space which is a mindfield already of troubleshooting when users call and complain (98% user error, but the 2% config / ip exhaustion or whatever bites you and so once folks have a working setup they really don't want to mess with it).
Subscriber link from Twitter if you (like me) ran into a paywall:

https://lwn.net/SubscriberLink/872869/0e62bba2db51ec7a/
Apprenticeship Online
As mush as it pains me to give google the benefit of the doubt. Their mapping just follows what their mapping cars and aerial photos gather.

But its pretty easy to report "problems" with their maps and get things corrected and removed from their suggested routes.

For example, near me there is an unlit and unpaved dirt alleyway linking two roads together. It cuts out about 5 mins of walking if you want to got to a road that links off those roads, but I really don't recommend that route to be a thoroughfare as even on dry days it can still be muddy because the tree cover will slow the ground drying out if it has been raining the day before.

When I needed to know where a street was and Google Maps directed me though that alleyway, I reported the problem to them and they removed that alley to be used as a thoroughfare and it only now suggests it if you want to go to the street that alleyway connects to.

So if you have people walking though your gardens or private land, report the issue to Google and hopefully they will fix it.
If you'll believe me, I know people who are completely free software nuts who also don't harass women at conferences
The C interop is especially useful for gamedev since so many libraries have a C interface and thus can be relatively easily used in Zig.
The more they take out of context, the more material they have to call out. It’s not like their follower-allies are going to mind that it was taken out of context.
RMS also says he isn't autistic IIRC
Of course, given public opinion, that day might never come.
Wouldn't you want to normalize by Joules produced instead of by reactor days?
He was succinct, not dismissive.
Can you suggest some news sources?
Sorry that you feel it's bad value. What would an appropriate price point be for you? There is an example 3D model on the homepage - that should give you an idea of how the output will look like.
I'll just chime in and say I believe you are misinformed and wrong on this issue. I can say definitively that my firm which engages in HFT and all the other quant/HFT firms I know of have decided to stay clear of the meme stocks, ie. GME, BB, AMC, and a few others and I am not aware of any open secret that HFT firms are sneakily taking advantage of this situation.

Your statement that HFT firms think that retail traders have no clue what they're doing is a complete misrepresentation of the intention behind PFOF. It's not at all that we think retail traders are idiots, it's that retail orders are usually not coordinated and sustained activities the same way that institutional orders are. If an institution is buying and I sell into it, it is quite likely that the institution will continue buying more and more over a long period of time which increases the duration of my exposure to that institution's order flow. Furthermore it's unlikely that institutional order flow on the continuous market will balance out with other institutional order flow, since in situations where such an opportunity exists, brokers for said institutions will arrange for a block trade or use auctions instead of the continuous market. So trading against an institution means assuming exposure for an extended period of time.

With retail orders, usually a trader buys with a few orders in a way that's typically uncoordinated with other orders and that's it. I don't need to be worried that if I sell to a retail trader that a whole bunch of further traders will follow behind them in the same direction, increasing my exposure.

This is not to say that institutions know what they're doing and retail traders don't, or vice-versa. An institution may have no idea what they're doing and pissing their money away and I still won't want to trade against it simply because as an HFT firm my goal is to lock in a spread as quickly as possible as opposed to speculate on the long term prospects of a company. If anything, to the extent that there is an open secret in this industry, it's that institutions don't perform much better or have much of an advantage over anyone else. That said even if they did it wouldn't matter one way or another, what I care about is that the order flow that I am trading against can balance out over a short period of time so that I can lock in the spread.

It is precisely because retail traders are behaving in a coordinated manner on meme stocks that my firm and all the other ones I know about are not participating in them. Retail flow on meme stocks is often coordinated, at least implicitly so as an HFT firm you may risk holding a significant position for a long time, which is not ideal.

That said the market is very big and the meme stocks constitute but a tiny fraction of a fraction of the activity. It's not a particularly big deal one way or another.
If you're interested, a research group at UC Santa Barbara put together an open source web application [1] prototype specifically for doing visualization and mapping of Ping echosounder data from an autonomous surface vessel[2]. You could almost certainly do the same with your set-up once you add a GPS. The data gets written into a GeoJSON FeatureCollection, which can then be imported into the page using OpenLayers and is displayed as a series of points with a color gradient based on the min/max of the imported points.

I did the echosounder integration and data collection, and helped build the mapping app's prototype. If you're interested in trying it out, feel free to reach out (email in profile) and I'd be happy to help!

[1] https://github.com/ucsb-coast-lab/sams-mapping

[2] https://github.com/aqualinkorg/asv
Research is an art top libraries are best at.

Many years back, I wanted to write-up an old, long-OOB publisher I was curious about. The internet Schultzed me - "I know nothing, nothing!"

Then I remembered how helpful 'Ask NYPL' (still exists) had once been in the past (when I'd called their 1-800 number with a question about where to find instruction.)

The publisher question took a while. NYPL weren't able to find a lot on the business but what they did find was key pieces - a business address and a clue that led to the author/owner's -real- name. Following up on that, the puzzle was soon (mostly) unlocked as a result. (Time's passage rubs out many details.)
Ditto with Ruby and web dev. The language was never designed with that application in mind (and very few people used it for that when I got into Ruby around 2000). Path dependence mostly accounts for the ubiquity of Python in science and Ruby in web dev; it just as easily could have gone the other way around.
I learnt it from "Type Theory and Formal Proof" when I wanted to understand type theory (I was in a community of functional programmers). BTW, nice book, I always recommend it to absolute beginners.
You're not wrong, but I will point out that Dreamgrid has an option for people to import pre-made enviroments (OAR files) from the outworldz server so you don't completely need to be a builder -but as far as I know, regions top out at 100 users (not that there's probably even 100 unique people on the hypergrid anyway -but I digress) so that goes back to your point regarding concurrent users.

High Fidelity got around that, but I'm not even sure if they're still around any more?
It depends on how you're using the hash lookup though. In my case, most lookups would be expected to not return a value, so completely filling the small hashmap will cause retrievals to be slower since it has to keep going until it determines that there's no match.
Maybe. Though NIMBYs seem to care more about volatility (ie variance) than expected value.

See http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.981...
This is very impressive.

I have no expertise here, but I was wondering if the low confidence in surf is due to bubbles? (I took a quick look at the transducer and software docs, but did not see anything explicit about the confidence figure.) If it is due to bubbles on the underside of the board, perhaps putting the transducer in the middle or behind would help? If it is due to bubbles in the water column, it reminds me of something I learned about lidar mapping: you may get reflections from the tree canopy, the understory or the ground, but in any small area, one can assume the longest-in-transit is probably the ground (and you can sometimes figure out the height of the other layers as a bonus.)
I've been doing some research into cryogenic energy storage and it seems like a universal solution to the grid scale energy storage problem. It uses off the shelf industrial components, can be located almost anywhere, doesn't use any rare or expensive elements, and there is no pollution in the cycle. The general idea is you cool air until it liquifies and store that in large storage tanks when you have an excess supply of energy. Then when you need to discharge the battery you boil the air and run the resulting gas through a turbine. It's also fairly cost competitive with a LCOS of $140/MWh, which is less than the cost of generating a MWh with new nuclear power plants.
I'm looking forward to something like the brilliant rayon parallel operations library https://github.com/rayon-rs/rayon

We won't get data race free guarantees but if built into pandas or Vaex we can have a near transparent API.

It'll really open things up for those apps running on 32 core machines. They're out there, I deploy these things frequently (Plotly Dash framework for large Enterprise customers).
I just didn’t find the jokes funny. They didn’t seem clever or surprising or anything. It felt like he didn’t try.
You don’t want to know. There are probably a lot more sharks near where people swim than you realize, but they generally aren’t interested in us.
The typing module is much more recent than the Zen easter egg.
Technically yes, of course.

But the government is acting as an agent for hire. Ugly.

As for push back, indeed. Your point is well taken.
I added try without signing up in my app[1]. Yet some users still use disposable mails, so there is that.

From a app developer perspective, it is definitely a downside when people use your app without email. You have no longer way to contact them for feedback or updating them on new releases. But it definitely filters genuine users. And also, people are more likely to checkout your app when you provide guest sign on.

I remember reading that Paulo Coelho distributed free copies of his books[2], so that people actually read what he wrote. Same with an early stage app, you should allow people to use what you have built as frictionlessly as possible, IMHO.

[1]: https://primerlabs.io

[2]: https://www.openculture.com/2011/09/how_paulo_coelho_started...