A big issue with the $1 recognizer is that it requires strokes to be drawn in a specific way, for example to draw a circle you need to go counterclockwise, if you go clockwise (as seems more natural to me) it gets recognized as a caret. This makes it not really usable in a context of free drawing were the users are not aware of the details of your implementation.
> Information reasonably sufficient to permit the service provider to contact the complaining party, such as an address, telephone number and email address
The model is trained to behave as a human would in a conversation, so I conclude that using words like "please" and "thank you" is more likely to lead to helpful answers.
Very rough calculation: assuming the RV is 5x2 meters that would be 10m^2 of solar panels. Solar energy that reaches the ground is about 1kW/m^2 at the peak, let's say that in a whole day we get the equivalent of 6h of peak energy (I'm probably overly generous here and not accounting for seasons and weather), and that the solar panels are 20% efficient. That makes 1x6x.2=1.2kWh per day.
The 4-battery version of the truck has a range of 400km with 448kWh of capacity, so that's 1.12kWh/km.
Putting everything together, running the truck on solar panels would afford a little more than 1km of range per sunny summer day of charge. To put it another way, a whole year of sun wouldn't be enough to charge the battery fully. So yeah, as tempting as it sounds, going full solar to power an RV that size is not viable. Even smaller ones aren't really either.
This is a big deal because since 1976, only China has (edit: had!) managed to land something successfully on the Moon. And also space exploration is cool in general.
You can't completely eliminate contact resistance, and all instruments have a noise floor, so electrical measurements don't constitute "true proof", they are an element of proof among others. The Meissner effect is perfect diamagnetism which can cause levitation and is not like ferromagnetism which only can allow a piece of material to stand up to align itself with field lines (and which is what we've seen so far).
Out of admittedly slightly perverse curiosity I opened the site without adblock : at some point when scrolling the whole page is covered with ads. An eyesore indeed.
Interesting, this video has been consistently pushed to me by the YouTube recommendation algorithm for the past 3 weeks. It looks like the recommender pressure is so strong it's influencing HN headlines.
I'm puzzled by this, looking at the resistance versus temperature graph they're not demonstrating zero resistance at 110K, they're demonstrating that at 110K the resistance becomes so low that it reaches the noise floor of their instrument. It's a stretch to call that superconductivity because when it come to that it needs to be actually zero, as in "I can put a current in a loop made of the material and come back one year later and it will still be there". Exponential decay will quickly catch up with a non-zero value, even very very small. Still this exponentially decreasing resistivity looks interesting, I have no idea if that's unusual or if that means anything. The weird dip at around 230K will need to be explained as well. I'm just an interested bystander, that goes without saying.
Not over a single dipole magnet. The "shape" of the field wouldn't make it stable, you'd need to add other magnets or a piece of string to stabilise. As I understand stable levitation over a dipole magnet is indicative of flux pinning which is a property exclusive to type II superconductors.
No, you can't float a regular magnet above another magnet or any number of magnets, that is not stable (it can be proven mathematically). You can float a diamagnetic material but you need at least 2 magnets, it wouldn't be stable with only one either. Note however that in the video the material is not completely floating, one corner is touching, that would be enough to stabilise a diamagnetic material for example so it's not a sufficient proof of superconductivity by itself.
It's not the same thing, Hola was found to use clients as exit nodes, which is definitely an abuse of client trust, resources, and potentially exposing them to major legal trouble or otherwise, but I don't think that can be considered a botnet, whereas the VPN app in question here is pulling lists of URLs from control sites and then directly sending requests to them, so it operates in the C&C fashion of a botnet.
Strange article. It is about an unrepairable pair of shoes that need to be recycled but its title is "Buy well, buy once". Not really the case, then ?
Then he mentions that he has only 192 "worldly possessions". I'd like to see the actual list, because if it is accurate he mustn't have many forks or boxes of food in his cupboards. So he probably lives in a big city, eats out very often, takes public transportation, and basically relies on external services for things he does not have. Which is a kind of lifestyle that has a lot of externalities and does not really have a minimalist impact on society as a whole, so it feels less appealing to me.
I'm rather in the opposite camp, if I have some fixing to do in my house, rather than call a plumber for example I'll buy the tools, learn by watching youtube videos of experts, and do it myself. Not because of a philosophical view of the world but because I like to learn skills and be self-reliant. My possessions also last a long time because I'm often able to repair them.
That would pose issues when iterating over a range that crosses the X/Y axis, you'd need special case for this. Or you might say that -0 +1 = 0 but I think that would probably break some fundamental properties of the ring of integers.
I think there is a symmetry problem, there is a A and a nA but not a 0 and a n0 ... It might feel weird but it might also avoid issues to simply forget about nA and go nC, nB, A, B, C and so on, to have the same mapping between numbers and letters.
It probably would, but if you're implying this would absorb a lot of CO2, I don't think so, plants die and when they do they decompose and release the CO2 back into the atmosphere. The conditions are not really met for a new carboniferous era right now and it took millions of years.
MHD is nothing new though, so if it has not yet replaced propellers I'm guessing it is because of practical issues like corrosion, electrolysis and so on alluded to in the article that DARPA seems to have found solutions for but which are not going to be available for the general public for obvious reasons.
Also it's all electric so it poses the usual problems like the added complexity of an on-board electric generator or the added weight and cost of a battery system.
Pretty entertaining concept, but I guess the site was developed with mobile in mind ? It's frustrating to use on a laptop, it looks like about 80% of the page is unused black space, with a big bar at the bottom, and the actual emoji area is smaller still, I can see about 3 rows worth of icons.
We might need to build a "web if humans" on the model of the web of trust used by PGP, a network of sites of quality vetted by other people. A bit like the web rings of yore but with more edges. This would also eliminate SEO spam sites.
I remember that the framerate was pretty important in Quake. Because player positions were interpolated linearly, you could miss the top of the parabola when jumping if your framerate was too low. I don't remember any numbers but getting a high framerate was definitely a concern when playing a bit competitively.
The "Thought Emporium" channel on YouTube has been exploring this kind of DIY gene editing, up to engineering a yeast with CRISPR technology, and inoculating it himself to cure his lactose intolerance. Very interesting channel in general with a hacking approach to bioengineering.
Firefox developer edition, Linux - I can't give any input. Moving the mouse pointer moves the camera POV slightly, so that it can end up below the ground, but apart from that no keys or clicks are registered.
Interestingly the source code base does not seem to have any tests. I guess it speaks of the strength of Scala's type system or the rigorousness of the developer.
I tried Scala a long time ago but I didn't like it, it felt every student of Martin Odersky's CS course at the EPFL got to design their own language feature, and they often
picked the same one but came up with different implementations.
I don't really buy that "vote with your wallet" argument. It's not like you really have a choice. People can't decide to buy their favorite game with our without an open infrastructure. For example of you want to play StarCraft 2 on LAN with your friends or even only a similar game you just can't. It does not exist. If there is only one candidate then it's not really a vote, is it?
It's also overlooking that there is an actual hero named X-OR, which is the French name of Space Sheriff Gavan, a somewhat popular (at least in France) Japanese show of the prolific "heroes in shiny suits and rubbery monsters from space" genre.
> The idea here is to use a minimal wasm binary as a stage1 kernel that is committed to source control and therefore can be used to build any commit from source. We provide a minimal WASI interpreter implementation that is built from C source, and then used to translate the Zig self-hosted compiler source code into C code. The C code is then compiled and linked, again by the system C compiler, into a stage2 binary. The stage2 binary can then be used repeatedly with zig build to build from source from that point on.
1/ Wouldn't that be considered "cheating" to basically commit precompiled compiler binaries to source control ?
2/ I don't understand how that solves the "features need to be implemented twice" problem. Wouldn't you need to implement new Zig language features into that WASM kernel whenever they are used in the Zig compiler source ?
No, that's not how it went. People were not stupid and lacking any foresight in the past. Constrained storage space has been a concern since Charles Babbage's analytical engine, that is since forever in computing. No one ever thought let's stop at 16 bit pointers or whatever and it will be enough for the rest of time. It's an engineering tradeoff to make the best of the technology available at the time. Pointer sizes are not just a number, they correspond to realities down to the electronics and physical design of your system. Longer pointers mean larger address bus, larger registers, more transistors on your chip that won't be available for something else. They are more wasteful if you don't actually have that much memory to address. It's incredibly naive to think today's standards were even a possibility decades ago.