skysight-inc/HackerNews huggingface dataset:
"Warp drives in Einstein's general theory of relativity provide a unique mechanism for manned interstellar travel. It is well-known that the classical superluminal soliton[0] spacetimes require negative energy densities[1], likely sourced by quantum processes of the uncertainty principle. It has even been claimed by few that negative energy densities are a requirement of superluminal motion. However, recent studies suggest this may not be the case. A general decomposition of the defining variables and the corresponding decomposition of the Eulerian energy are studied. A geometrical interpretation of the Eulerian energy is found, shedding new light[2] on superluminal solitons generated by realistic energy distributions. With this new interpretation, it becomes a relatively simple matter to generate solitonic configurations, within a certain subclass, that respect the positive energy constraint. Using this newfound interpretation, a superluminal solitonic spacetime is presented that possesses positive semi-definite energy[3]. A modest numerical analysis is carried out on a set of example configurations, finding total energy requirements four orders of magnitude smaller than the solar mass[4]. Extraordinarily, the example configurations are generated by purely positive energy densities, a tremendous improvement on the classical configurations. The geometrical interpretation of the Eulerian energy thus opens new doors to generating realistic warp fields for laboratory study and potential future manned interstellar travel."

0: Soliton - A "single bump" wave that propagates. See youtube for examples in water. These are (well-studied) solutions to the wave equation. In spacetime, we want some local "warp bubble" bump that is capable of moving/propagating around.

1: Negative energy density: Colloquially, this is like requiring negative mass. Nobody knows if this exists; most aren't hopeful.

2: Nice pun.

3: Positive semi-definite energy: I.e. non-negative (>=0)

4: So we're still talking mass-energies of Jupiter-(ish)-sized planets

This is very cool stuff. Definitely going to read the whole paper after work. Current questions:

- Is this really superluminal? Famously, the Alcubierre "warp bubble" solution doesn't actually propagate you superluminally unless you start it off that way.

- Is there a Minkowskian interior? The warped part of space is like your engine. We also need to have it carry around some flat space if we want it to be capable of carrying passengers.

- Can we construe this into PoC tests? How much energy do we need to detect warping (e.g. laser deflection) with current tech? Could some large-scale LIGO-like setup achieve detection?
If you scroll down a bit further, you can find some pictures of rooms that people actually use, instead of the flooded and decaying rooms. Looking at the compact and efficient setups of those residents, I actually thought it seemed kinda cozy.
Oh, that would explain why it seemed to be complete bollocks then. Perhaps a not dissimilar modern equivalent would be infinite scroll content? Smiles from right next to Macau. :)
Let's clarify. It's public in the sense that a limited number of customers are driving with this on public roads.

Also, Elon keeps promising "the button" which would allow any Tesla FSD "owner" to get the software.

A number of people shelled out $10k for this software that they do not yet have. So there is a real possibility that it may soon be made available to everyone.
Which also means that OP shouldn't be on the hook for repairs unless it's due to negligence.

And even IF OP is on the hook they should be able to choose how to repair it, as long as it fits NHTSA/DMV/whatever code.
You can't appear online for a customizable period of time.

So say you are at your desk but not working on the computer with Teams on it (and it is reasonable to be responsive to incoming messages).
Louis seems to be caught up in the middle of an intersection of some COVID related issues and his own mistake for several years.

It will also get resolved and/or not matter (in that once things return a bit to normal any accrued fines/fees will be forgiven). But in the meanwhile it provides Louis, whose YT channel no longer resembles the educational/right to repair focused channel it used to be, but rather dependent on views from whining about different stuff, more fodder for views.
If I rent an apartment and the landlord doesn't fix something, I can fix it with my own repairman and charge them the bill. There is nothing special about renting.
> in Cuba there is likely still majority or close to majority support for the government

This is quite an assumption, and if it's true, it's only because those who disagreed with the regime have already been killed or leapt into the ocean to perish or prosper in Miami
Sure there is. Go to Settings and move down to Entry. Hit Enter and you get your choice of Textbook, Algebraic, or RPN. Go down to RPN, press Enter and then Esc.

Presto, RPN.
Love your work Mark. I have been digging into your book. I'm looking to incorporate Datomic into my project to store generations from GPT-3. Will be taking quite a few pages from your book. Thanks! I'm getting around to paying for your book, sorry I haven't done it yet.
https://semiosis.github.io/posts/representing-multiverses-wi...
> you have to schedule that with the government.

or you could schedule it with the hospital and dont pay any fees because its covered under healthcare like what happens in other countries?
What do the authors of these warp drive papers think will happen causality-wise when the proposed vehicle effectively moves faster than c? You can't do that without doing nasty things to your light cone[0] and effectively traveling into your own past. Is a prerequisite of entertaining the idea of a warp drive that we disregard causality? As far as I know, there aren't any plausible loopholes in General Relativity that allow you to pop up anywhere and anywhen you want in spacetime.

[0] https://en.wikipedia.org/wiki/Light_cone
Thoughts on Free Will
> Rebekah believed so strongly in her husband’s vision that she took a big bet: financing WeWork’s first location using some of the $1 million that her parents had given the couple as a wedding gift.

> Rebekah tried to downplay her comfortable upbringing, saying she grew up “off a dirt road in, like, a tree house.”
It’s not. It’s just stupid ideas about never ending unchecked growth.

As the population declines, and it should, technology and policy will change to make things work. Better use of automation, better end of life care policies, managing death instead of “doing everything you can”, etc.
Need to add Nikola toy truck
As I said elsewhere, I would totally do this if it were my own car. It seems kind of unethical to do it to a car you don’t own, though. And if the leasing agreement didn’t prohibit this before, I’m sure Tesla lawyers are working on that now.
When your system is replacing some existing system, which could well be just paper-based, it is very useful to study it carefully. It will give you a good idea about the data and its internal relations. If you want to show something to a customer, you can also simple mock-ups like static HTML pages.

Only after you have a decent understanding of the system you should start building it. There will be many new requests, but most will just be concerned with the UI. If you have the right data model and architecture, those will not be very difficult to solve.
Emerging disease: fatal squirrel encephalitis VSBV-1
Sounds like what is supposeto happen when we elect officials to do our bidding.
Sure, I was imagining implementing better race semantics the way Java/C# do, by referencing certain multi-word data by pointer to avoid partial update problems. As it is now slices are 192-bit values (on 64 bit systems) embedded directly in objects that can be shared across threads, I don't know how you would efficiently update that atomically.
Progress in warp field research though has resulted in significant energy reductions though - everytime a more efficient formulation is found its a step on the way to a possible practical system.

After all, if it was easy then everyone would be doing it.
General public is affected. A Tesla can cause accident on a public road with other drivers on the road, or cause a cascade or a pile-on - innocent bystanders can die or be injured.
For a company that exists because of technological and economy of scale gains, primarily in battery tech, it was always odd to me the way Elon would say LIDAR was too expensive or not fast enough. LIDAR et al have come a long way in the last 5 years and will continue to evolve at an exponential rate due to the efforts being put into them.

Yes, I get it, humans use 2 eyes only, but sensor fusion of complementary technologies is so powerful. When lives are on the line, having more than one type of sensor involved is just prudent engineering.
I've been saying for decades: Go to Singapore.

The setbacks to allow for urban green is amazing, and further, due to the weather they are building underground causeways which allow for people to avoid the heat and the large rainfall there un-molested such that they can easily get around.

Favorite city on earth.
Same in Firefox - the page goes blank after loading. I get `Uncaught (in promise) TypeError: window.ga.getByName(...) is null` in the console.
You're maybe right, but I'm not sure Apple is known to be less draconian.
Apples to apples would be comparing miles driven on FSD autopilot to miles driven by human drivers in similar makes of vehicle on the same types of roads in the same weather conditions.

Human drivers don't steer towards concrete pillars every time they drive down the street.
It didn't sound like he attempted or succeeded in any sort of violent uprising against authority, despite his violence against the door. It sounds like he was attempting to comply with authority, perhaps in violation of some rules, ordinances, or laws.
I don't think 'walled garden' is marketing jargon. It's a negative term. Where have you seen that in marketing?
Well for one thing, a speed-of-light limited warp drive would still be effectively a reaction-less drive we could use for travel in the solar system.

But a decent way to beat Einstein would be find and implement an actual FTL engine: after all, if you can do it then obviously the theory isn't correct (alternately: the universe possible does not care about causality as much as we do in our little bubble of perception).
It's not a warranty - it's a lease.
in case??
Better than the `alternative` ?... which is drive the car like everyone else?

Why do Tesla drivers get the privilege to beta-test their cars on public road with everyone else around and potentially in their kill-zone?
Buying whatever is unfashionable and just a hair older than whatever lenders will finance is where the value always is.

Of course both of those are moving targets to some extent.
Most of the people I knew that liked Defender and Robotron also liked Joust. Also Williams Electronics produced, though it doesn't mention Jarvis or DeMar as being involved.
In college I used to handwrite out all my notes and prepare cheat sheets for tests but I would never refer back to them. Just the action of writing them out helped me to remember things much better than my normally lousy memory.
How do you know what the specifications are, as Tesla flaunts the law and doesn’t publish them?

Given the many examples of poor build quality with Tesla cars, it’s laughable to make some sort of case that any third party part doesn’t meet some standards that nobody can see.

I have leased many cars in my lifetime, and never used anything but the cheapest parts available for out of warranty parts. Federal law allows you to use a third party part.
Also C/C++ was gradually developed so it can be understood. Go had the benefit of a lot of hind sight and still ended up like this
I believe a large portion of his business is now mail in repairs vs walk in repairs. Laptop repair also isn’t something that people have a regular customer base to rely on, it is very inconsistent. Rent and taxes in NYC are a massive amount of money, I’m sure he has ran the numbers to determine what’s best financially.
I don't know them but someone shouldn't lie about their bio if that were the case. But maybe it was a fancy place off a dirt road? There's plenty of those in Saratoga and Los Gatos, CA. ¯\_(ツ)_/¯ The onus is on the individual's morals and ethics.

It's easier to make money when you already have it, but it's not always easy to keep it if you don't value it or know how to make it in the first place.

They did grow to rival Regus. Although globally-ubiquitous, Regus failed to market and brand themselves properly to anyone under 45 or anyone without a briefcase.
Why Is an Enterprise Sale So Complex?
Is it an anti-pattern? Depends.

Good database design has a single canonical represention for any particular bit of information. In part this is to avoid all-too-easy inconsistencies--"a person with two watches never knows what time it is." It also improves maintainibility, and by avoid potential inconsistencies simplifies validation of code and data.

The SQL term is "normalization" [0]. In a fully-normalized database you can change the value of any one non-prime (key) attribute and still have an internally-consistent database; it may violdate business rules not modeled, or otherwise not match the real world, but all parts of the data model agree with all the other parts.

If you really have a hard-and-fast rule that "somebody is working" is equivalent to "restaurant is open", and you choose to model that rule in the database, then RESTAURANT.IS_OPEN breaks normalization. You can't flip "is_open" true or false without also changing the "is working" state of at least one employee.

However, it is common to de-normalize databases. For example, you may have "account" and "transaction" tables, and the current balance for an account is the monetary sum of all its transactions. But you may very well choose to have a BALANCE column in ACCOUNT, to avoid summing every transaction every time you want to look at the current total. The trade-off is that you must make really, really sure the redundancy is always known and always processed correctly.

If you do choose to de-normalize, there are better and worse ways to do it. IS_OPEN is pretty bad; every time an employee goes off-shift you have to look at all of the other employees to see if someone else is still on-shift and the restaurant is still open. NUM_WORKING (how many employees currently working at the restaurant) would be better; any on-/off-shift change only requires (atomically) updating a single employee row and the restaurant row. Or, you might have NUM_SERVING, to see if the restaurant can actually process customers.

It is a good idea to identify important potential inconsistencies (balance might not equal sum of the transactions), provide for periodic auditing, and specify how they are resolved (TRANSACTION is truth, BALANCE must be changed).

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

[1] https://en.wikipedia.org/wiki/Second_normal_form
If you can demonstrate that you were trying to get it into production, then there's nothing wrong with a lawsuit. I mean, maybe there are better solutions (making them more and more expensive to hold the older they get was mentioned by someone). The goal should be to prevent hoarding for the purpose of rent seeking, without intention for ever actually producing anything. That is, that patents are to protect your invention while you implement it, in order to encourage innovation.

But honestly, I'd be happier to just abolish patents altogether.
The article in ScienceAdvances mentions the Peel River, Yukon. The river's crossed by the Dempster Highway, which is 'a tributary' of the Klondike Highway, near Fort McPherson, NT. Maybe that's 'not even close' enough?
What’s Next After Defi and NFT’s
> Even though you are fractionally at fault you are on the hook for everything.

It is important to note that you can then sue the other at fault parties for whatever you had to pay that was above your fair share.

For example if I'm 90% at fault and you are 10% at fault in something that causes $1 million damages to someone and they come after you and win $1 million, you can turn around and sue me for for $900k.

I might not have $900k and so you might still end up screwed but in that case it is either you who gets screwed or the person you and I injured, and the idea behind joint and several liability is if we have to screw someone it should not be someone who was at fault.
Maybe I didn't state my original point well, but I'm only trying to point out that this type of repair done as well-known problem on a popular car would be a few hundred dollars. I don't think you could find a Tesla-focused shop that would do the repair for much less, and the customer here is definitely happy with the price.

I'm not putting down Electric Garage for charging "too much", but rather pointing out how lucrative it is to go into the third party repair business for Teslas. Anyone into Right to Repair should appreciate encouraging a more vibrant repair market.

My point about the material of the fitting is that you can run into trouble when you use a stronger/heavier material to tie into an existing lighter piece. For example, the next hit to that area will end up breaking the newly-threaded part as the brass acts as a lever and stress point, necessitating a much deeper repair.

In general, plastic would be a better starting point. Given that there are no less than 3 types of plastic visible in the area of a repair, surely there is some commonly-available plastic that will work. A sibling comment says it's using Zerex G48 antifreeze. It looks like that is compatible with nylon. Five minutes of web research isn't a way to be sure though, and obviously you'd want to be very sure before actually using it. But a mechanic can figure that out once and then they'll know. Just like the mechanic in the video says they've used brass before and know it's compatible.

> The insurance didn't cover road debris, 16K is what Tesla charges for the parts and R&R of the battery pack to customers

Yes, I understand Tesla's policies here. The point is the policies themselves are patently ridiculous. If my car window were to get smashed and the dealer told me the only way they could fix that window was to sell me a new car, any insurance company would rightly balk - because insurance companies understand that windows can be replaced independently.

Here Tesla is disingenuously claiming that the battery pack is some indivisible unit, and insurance companies just don't know any better yet. If you watch the video, you can hear the customer explain that Tesla pushed back hard on him wanting to keep his old battery pack. That's because they don't throw bad packs into the trash, but rather they recover most of their value by rebuilding them. Yet the customer/insurer is paying as if there is no residual value in the broken pack ("core charge"). Fraud is a strong word, but I feel it appropriately describes what Tesla is doing to insurance companies with these policies.
Summary: An enterprise sale is a significant source of opportunity for startups, but it is a complex undertaking with many moving parts and many people involved. The founders must discover and diagnose the need, determine that the offering can be configured to create value for the customer, build alignment among decision-makers, explore how to work with the customer to co-create value, manage risk, and lay the groundwork for a long-term relationship.
They found a bacteria with extra-genomic material that isn't in the shape of a plasmid (circular DNA that is a feature of bacterial transfection and gene transfer).

They believe it came from archean rather than bacterial sources. (Not really related, but many of our genes, and indeed one of our critical organelles, are also archea-derived, ie. the mitochondria.)

The genomic payload is large and comes with replication machinery (it might be a useful tool!)

Plasmids hold a much smaller payload than these units, and they're difficult to work with. Borgs are huge. If we can turn them into transfection toolkits, we can do larger scale genomic experiments much faster. That's extremely exciting.

Much of biochemistry research and understanding is done in bacteria. They're extremely useful little computers. We just discovered an extremely useful way to hack them.

In the wild, the gene payload codes for novel methane metabolic pathways. This also is of great interest. Not only for applicability to climate science, but also the natural ability to swap out or augment bacterial metabolism. Imagine all of the novel things you might swap in instead.

Who knows. These might wind up in eukaryotic cells too!
In Go, sending a value through a closed channel panics the program, and receiving a value from a closed channel immediately returns the zero value for the channel (and a false, if you use the two-return-values form of the receive operator).

There's no difference in what side closes the channel, I think, just in how a closed channel behaves when you try to send or receive on it.

Personally, I think it's terrifying that the "easy" option just lies to you instead of crashing the program, but I kind of see how it fits with some of Go's other design decisions that I'd also have made differently (Option/Result instead of pervasive nullability).
Only if crazy is normally-distributed.
Yes I do the same because in fact on Solaris 10/11, only -X works. There is no -n switch. So I believe -X is more reliable across unixes.
Could Bethlehem Steel plant have been saved? (2015)
You're right, most people would consider that to have broken the link, and that's unfortunate because it's a misleading interpretation.

As explained in the comment you're replying to, the aggregate statistics are very different from the per-cohort statistics, which are unfortunately not prominently displayed.

And you also have not taken into account exponential growth and time lag. Predictions are that infections are to rise significantly to perhaps more than 100,000 per day. It hasn't occurred yet, and it's inevitable that it will accelerate if there's an abrupt change of behaviour.

It will be several weeks later that this will translate to whatever turns out to be the exponential rise in severe disease statistics, just as the current reported death rate is time-lagged from infection rates several weeks ago.

And not mentioned here is the non-death severe consequences: Long Covid mainly, which young people get. And all those people with cancer who can't get treatement while the hospitals are full of Covid patients, and for that matter, daren't risk going to hospital anyway because of the immunosuppressants they are on.

For those in the wrong cohorts, the link is not broken, and the death risk to them is about to go up as they are forced back onto public transport and back to workplaces with protections removed.

They are by no means all "laggards" with regard to vaccination, as though that's a personal choice.

I personally am eager to be vaccinated but won't be fully vaccinated with the appropriate post-second-shot delay until beginning of October. I'm in a slightly at risk group, and my family is significantly at risk. So there's no way I'm risking going to any shops or anything like that between now and October :/

That's why I feel for those who don't have work at home jobs. I do, and I'm eager to keep it that way.

If you're one of those people who likes to say "who cares if 10% of our users can't read our website", perhaps you also are the type to think "who cares if the death link isn't broken for 33% of the population, it's broken for the other 67% so that's fine!".