Vine was fun. I think, the actual problem is commercialization and advertisement. That's creating the incentives to hijack any form of social media and turn them into addictive brain rot machines.
Metric prefixing should only be used with the unit bit. There is no confusion there. I mean, if you would equate a bit with a certain voltage threshold, you could even argue about fractional bits.
Approximating metric prefixing with kibi, Mibi, Gibi... is confusing because it doesn't make sense semantically. There is nothing base-10-ish about it.
I understand the sentiment, but it’s the correct term for such facilities. You don’t need gas chambers to qualify. As far as I know, the terms is also used for historic ethnical imprisonment facilities for Japanese people in the USA, which seems very comparable.
It would be preferable to charge the car in solar panel shaded parking lots at work during the day. You have to charge it at home, because charging EVs has only recently entered architectural and city planning. For the most part, EVs are the battery to buffer peak sun energy.
Marine transport is stupidly efficient and probably won’t influence those numbers much. For the same reasons it’s absolutely okay to eat avocados from overseas. I believe the processing of oil to gas is quite energy intense tho.
No, not at all. Coke or hydrogen always only provide additional heat, they are never the main source of heat. The main heat source can either be coal or an electric arc furnace. The coke or hydrogen are just necessary for the chemical reaction, and providing some heat is a side-effect.
Sorry, in face of OP’s tone I allowed myself some sarcasm. Obviously there needs to be additional energy. You’d have some equilibrium with those reactions and OP didn’t make any argument why that can’t be controlled in favor of reducing Fe2O3.
It’s also borderline unbelievable OP never heard of hydrogen in future steelmaking, if they are at all invested in the topic. You’d need a special kind of ignorance to think people are hugely throwing money at this, when the basic chemistry is infeasible.
Well, actually, thermolysis for water occurs at 2200°C. Thermolysis of CO₂ starts at 1400°C, of CO at 3700°C. The melting point of iron is around 1500°C, similarly its oxides.
So water as a product is actually more stable than CO₂, and doesn't undergo thermolysis at the relevant temperatures for smelting iron. Whereas when going the CO₂ route, there is the risk of producing relevant amounts of CO, which is not as desirable and less efficient because it only absorbs half the oxygen.
Cost is a big question, but it will for sure be more expensive to use hydrogen. Back of the envelop calculation (250$/t coal price, need 1/3t of H_2 for the same effect, so H₂ may cost up to 750$/t, need 40kWh/kg for H₂ electrolysis at 100% efficiency) gives a breakeven electricity price of 1.875ct/kWh. While this happens from time to time due to overproduction, those prices will even out as soon as there is a market for that excess electricity through batteries, storage and electrolysis. Which means that cost-wise, the H₂ route will never be more effective than coal. To make it viable, coal use needs to be made more expensive through taxes and tariffs.
I believe right now, it's expected to cost about 30% more. But we don't have an hydrogen economy yet, or 1000 years of experimentation as with carbon as reducing agent. There is probably still some room for innovation in material science for every part of the process.
You can get pretty quickly at it with Blender instead of proper CAD. Just do the "donut tutorial", set the correct workspace dimensions and go for it. You can learn basic modelling in a day.
Blender is overwhelming at first glance, but it becomes incredibly intuitive once the UI clicks. Of course modelling for printing in Blender has drawbacks and limitations. It's more fiddly, but unless you are super stupid, you can get pretty far, pretty quickly. And you can do sculpting and organic shapes, which are hard/impossible in CAD. Learning Blender basics is worth it anyway, incredibly useful for thinking and sketching in 3D. Oh, and it's FOSS, runs entirely locally, doesn't spy on you, or appropriates your creations like the "free" Fusion360 and their forced cloud crap.
Once you got annoyed by Blender's limitations for 3D printing, you can learn CAD. But Blender is the best way to get into it IMO. Trust me, you won't regret learning Blender basics, in any case. It's expanding your creative horizon and is fantastic, very pleasant software.
Both Blender and Fusion have pretty steep learning curves, so you will have to dedicate a significant amount of time to get to the point where you can just sit down and go from an idea you have to something that is of use whatever you choose.
But.
The thing is that Blender and Fusion do not even exist in the same universe. If your goal is to make mechanical parts it doesn't help you to learn something that is only good at creating meshes. Just as there is little point to learning Fusion if you want to create 3D characters for, for instance, animation.
Everyone tends to start by making shapes, but if you are making 3d printed mechanical parts you soon realize you have to graduate to learning how to do CAD in general. If you are making mechanical parts you tend to deal with precise geometry and geometric relationships. It is usually 2D geometry that drives most of the design. CAD models are often also parametrized so that you can change dimensions, angles, multiples of features etc.
I second Blender. I don't use anything else and don't see why I would want to. I hope to get into geometry nodes in future.
The donut tutorial is .. handwavy relevant to 3D printing.
3D modelling for 3D printing doesn't require materials, colours, lighting, camera placement etc etc. But doing the donut tutorial will get you used to many aspects of blender and realise just how powerful this software is. It's also kind of a Blender right-of-passage.
The Blender documentation is fantastic if you prefer to learn via pages than random video-build-a-thing tutorials.
Blender tends towards using keyboard shortcuts. Learning them can greatly speed things up.
And Blender has a large body of community forums for questions and answers if you want to search(first), post a question, or likely ask your friendly AI what the answer is.
[edit] the bite sized blender basics videos on the blender.org site no longer easy to find. :-(
Ha! I believe every RNode can be used to bootstrap a Reticulum network, as that tiny ESP32 hosts the RNode firmware, the full network software stack and documentation! The RNode has the capability to become a Wifi access point, if you connect you get this at 10.0.0.1.:
This post seems to be weirdly censored by HN. It got immediate traction, when it briefly hit the frontpage, yesterday.
Since then, I reliably cannot find it coming from the frontpage (or 15 pages in). It's not flagged/dead, got quite a lot of upvotes, obviously, the topic is popular and highly relevant across industries as major inflection point for US-EU relations. Never noticed anything like that on HN.
However, the weird thing is, I somehow still observe new human participants finding their way in (through votes and comments).
So, HN is presumably heavily interfering with traffic and visibility on this one.
This post is ranked 7th in /active, now. Quickly cross-checking /active and /news, I've found no other post in /active not visible in /news. It went from 100 to 200 points, since I noticed the delisting. /active is an obscure list, I doubt, that's how many people find this post.
Whatever HN is doing, it seems to be completely intransparent and selective. Some A/B-ing, or geofencing. In any case, questionable and manipulative. Like they are trying to hide interference and engineer popularity/engagement to whatever end.
And you have to wonder, if this has anything to do with the fact this particular political move seems to have greatly backfired on every possible axis, apparently even within the conservative and MAGA base. May turn out as exceptionally stupid, especially before midterms. I've seen impeachment calls in /r/conservative (lol), and they are usually an extension of Trumps digestive system. Diplomacy with Europe is basically dead, France wants to trigger the EU's extortion clause and it's a sunday.
If it’s “gone” then it’s because too many users flagged it. You can turn on “showdead” in your profile to see them again. It isn’t done covertly. You can email hn@ycombinator.com about specific posts to get an explanation.
So it’s not actually gone? Again, instead of speculating, send an email if something is unclear. Yes, moderation is purposefully selective, but not based on political agenda. Dang has repeatedly explained moderation policy in the past.
It is? Dude, just check yourself, instead of sealioning?!
It's in /active, not frontpage or 15 pages in as stated above. It's not marked anything, which would also show next to the title of the post itself. So what's your fucking offense? If all of this is of no concern to you, why bother commenting? Yeah, thanks for pointing out I can write mails somewhere. I should also write my representative and call the embassy. And sorry, I haven't read every thread ever to know what Dang said at some point in the past. Well, what did he say about opaque visibility manipulation? How about leaving a message in respective threads?
I was just pointing out there is intransparent, weird censorship for this post. I don't care as much about the alleged reasons. People should be aware this is a covertly distorted discussion.
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